diff --git a/libs/ur-parse-lib/src/keystone_ur_decoder.rs b/libs/ur-parse-lib/src/keystone_ur_decoder.rs
index e9b5e62..32398b1 100644
--- a/libs/ur-parse-lib/src/keystone_ur_decoder.rs
+++ b/libs/ur-parse-lib/src/keystone_ur_decoder.rs
@@ -126,6 +126,8 @@ mod tests {
     use crate::keystone_ur_decoder::{probe_decode, MultiURParseResult, URParseResult};
     use alloc::string::ToString;
     use ur_registry::crypto_psbt::CryptoPSBT;
+    use ur_registry::cardano::cardano_sign_data_request::CardanoSignDataRequest;
+
     use ur_registry::ethereum::eth_sign_request::EthSignRequest;
 
     #[test]
diff --git a/libs/ur-registry/src/cardano/cardano_sign_data_request.rs b/libs/ur-registry/src/cardano/cardano_sign_data_request.rs
new file mode 100644
index 0000000..1457807
--- /dev/null
+++ b/libs/ur-registry/src/cardano/cardano_sign_data_request.rs
@@ -0,0 +1,107 @@
+use crate::cbor::cbor_map;
+use crate::crypto_key_path::CryptoKeyPath;
+use crate::error::{URError, URResult};
+use crate::registry_types::{RegistryType, CRYPTO_KEYPATH, CARDANO_SIGN_DATA_REQUEST, UUID};
+use crate::traits::{From as FromCbor, RegistryItem, To, MapSize};
+use crate::types::Bytes;
+use alloc::format;
+use crate::impl_template_struct;
+use alloc::string::{String, ToString};
+use alloc::vec::Vec;
+use minicbor::data::{Int, Tag};
+use minicbor::encode::Write;
+use minicbor::{Decoder, Encoder};
+
+const REQUEST_ID: u8 = 1;
+const SIGN_DATA: u8 = 2;
+const DERIVATION_PATH: u8 = 3;
+const ORIGIN: u8 = 4;
+
+impl_template_struct!(CardanoSignDataRequest {request_id: Option<Bytes>, sign_data: Bytes, derivation_path: CryptoKeyPath, origin: Option<String>});
+
+impl MapSize for CardanoSignDataRequest {
+    fn map_size(&self) -> u64 {
+        let mut size = 2;
+        if self.request_id.is_some() {
+            size += 1;
+        }
+        if self.origin.is_some() {
+            size += 1;
+        }
+        size
+    }
+}
+
+impl RegistryItem for CardanoSignDataRequest {
+    fn get_registry_type() -> RegistryType<'static> {
+        CARDANO_SIGN_DATA_REQUEST
+    }
+}
+
+impl<C> minicbor::Encode<C> for CardanoSignDataRequest {
+    fn encode<W: Write>(
+        &self,
+        e: &mut Encoder<W>,
+        _ctx: &mut C,
+    ) -> Result<(), minicbor::encode::Error<W::Error>> {
+        e.map(self.map_size())?;
+        if let Some(request_id) = &self.request_id {
+            e.int(Int::from(REQUEST_ID))?
+                .tag(Tag::Unassigned(UUID.get_tag()))?
+                .bytes(request_id)?;
+        }
+
+        e.int(Int::from(SIGN_DATA))?.bytes(&self.sign_data)?;
+
+        e.int(Int::from(DERIVATION_PATH))?;
+        e.tag(Tag::Unassigned(CRYPTO_KEYPATH.get_tag()))?;
+        CryptoKeyPath::encode(&self.derivation_path, e, _ctx)?;
+
+        if let Some(origin) = &self.origin {
+            e.int(Int::from(ORIGIN))?.str(origin)?;
+        }
+
+        Ok(())
+    }
+}
+
+impl<'b, C> minicbor::Decode<'b, C> for CardanoSignDataRequest {
+    fn decode(d: &mut Decoder<'b>, _ctx: &mut C) -> Result<Self, minicbor::decode::Error> {
+        let mut result: CardanoSignDataRequest = CardanoSignDataRequest::default();
+        cbor_map(d, &mut result, |key, obj, d: &mut Decoder| {
+            let key =
+                u8::try_from(key).map_err(|e| minicbor::decode::Error::message(e.to_string()))?;
+            match key {
+                REQUEST_ID => {
+                    d.tag()?;
+                    obj.set_request_id(Some(d.bytes()?.to_vec()));
+                }
+                SIGN_DATA => {
+                    obj.set_sign_data(d.bytes()?.to_vec());
+                }
+                DERIVATION_PATH => {
+                    d.tag()?;
+                    obj.derivation_path = CryptoKeyPath::decode(d, _ctx)?;
+                }
+                ORIGIN => {
+                    obj.origin = Some(d.str()?.to_string());
+                }
+                _ => {}
+            }
+            Ok(())
+        })?;
+        Ok(result)
+    }
+}
+
+impl To for CardanoSignDataRequest {
+    fn to_bytes(&self) -> URResult<Vec<u8>> {
+        minicbor::to_vec(self.clone()).map_err(|e| URError::CborEncodeError(e.to_string()))
+    }
+}
+
+impl FromCbor<CardanoSignDataRequest> for CardanoSignDataRequest {
+    fn from_cbor(bytes: Vec<u8>) -> URResult<CardanoSignDataRequest> {
+        minicbor::decode(&bytes).map_err(|e| URError::CborDecodeError(e.to_string()))
+    }
+}
diff --git a/libs/ur-registry/src/cardano/cardano_sign_data_signature.rs b/libs/ur-registry/src/cardano/cardano_sign_data_signature.rs
new file mode 100644
index 0000000..07582e9
--- /dev/null
+++ b/libs/ur-registry/src/cardano/cardano_sign_data_signature.rs
@@ -0,0 +1,78 @@
+use crate::cbor::cbor_map;
+use crate::impl_template_struct;
+use crate::registry_types::{CARDANO_SIGN_DATA_SIGNATURE, RegistryType, UUID};
+use crate::traits::{MapSize, RegistryItem};
+use crate::types::Bytes;
+use alloc::string::ToString;
+use minicbor::data::{Int, Tag};
+use minicbor::encode::{Error, Write};
+use minicbor::{Decoder, Encoder};
+
+const REQUEST_ID: u8 = 1;
+const SIGNATURE: u8 = 2;
+const PUBLIC_KEY: u8 = 3;
+
+impl_template_struct!(CardanoSignDataSignature {
+    request_id: Option<Bytes>,
+    signature: Bytes,
+    public_key: Bytes
+});
+
+impl RegistryItem for CardanoSignDataSignature {
+    fn get_registry_type() -> RegistryType<'static> {
+        CARDANO_SIGN_DATA_SIGNATURE
+    }
+}
+
+impl MapSize for CardanoSignDataSignature {
+    fn map_size(&self) -> u64 {
+        let mut size = 2;
+        if self.request_id.is_some() {
+            size += 1;
+        }
+        size
+    }
+}
+
+impl<C> minicbor::Encode<C> for CardanoSignDataSignature {
+    fn encode<W: Write>(&self, e: &mut Encoder<W>, _ctx: &mut C) -> Result<(), Error<W::Error>> {
+        e.map(self.map_size())?;
+
+        if let Some(id) = &self.request_id {
+            e.int(Int::from(REQUEST_ID))?
+                .tag(Tag::Unassigned(UUID.get_tag()))?
+                .bytes(id)?;
+        }
+
+        e.int(Int::from(SIGNATURE))?.bytes(&self.signature)?;
+
+        e.int(Int::from(PUBLIC_KEY))?.bytes(&self.public_key)?;
+
+        Ok(())
+    }
+}
+
+impl<'b, C> minicbor::Decode<'b, C> for CardanoSignDataSignature {
+    fn decode(d: &mut Decoder<'b>, _ctx: &mut C) -> Result<Self, minicbor::decode::Error> {
+        let mut cardano_sign_data_signature = CardanoSignDataSignature::default();
+        cbor_map(d, &mut cardano_sign_data_signature, |key, obj, d| {
+            let key =
+                u8::try_from(key).map_err(|e| minicbor::decode::Error::message(e.to_string()))?;
+            match key {
+                REQUEST_ID => {
+                    d.tag()?;
+                    obj.set_request_id(Some(d.bytes()?.to_vec()));
+                }
+                SIGNATURE => {
+                    obj.set_signature(d.bytes()?.to_vec());
+                }
+                PUBLIC_KEY => {
+                    obj.set_public_key(d.bytes()?.to_vec());
+                }
+                _ => {}
+            }
+            Ok(())
+        })?;
+        Ok(cardano_sign_data_signature)
+    }
+}
diff --git a/libs/ur-registry/src/cardano/cardano_sign_structure.rs b/libs/ur-registry/src/cardano/cardano_sign_structure.rs
new file mode 100644
index 0000000..751e512
--- /dev/null
+++ b/libs/ur-registry/src/cardano/cardano_sign_structure.rs
@@ -0,0 +1,86 @@
+use crate::cbor::cbor_array;
+use crate::crypto_key_path::CryptoKeyPath;
+use crate::error::{URError, URResult};
+use crate::registry_types::{CARDANO_CERT_KEY, CRYPTO_KEYPATH, RegistryType};
+use crate::traits::{From as FromCbor, MapSize, RegistryItem, To};
+use crate::types::Bytes;
+
+use alloc::string::{String, ToString};
+use alloc::vec::Vec;
+use prost::Message;
+use core::convert::From;
+use minicbor::data::{Int, Tag};
+use minicbor::encode::{Error, Write};
+use minicbor::{Decoder, Encoder};
+
+const KEY_CONTEXT: u8 = 0;
+const KEY_PROTECTED_HEADER: u8 = 1;
+const KEY_EXTERNAL_AAD: u8 = 2;
+const KEY_PAYLOAD: u8 = 3;
+
+use crate::impl_template_struct;
+
+impl_template_struct!(CardanoSignStructure {
+    context: Bytes,
+    protected_header: Bytes,
+    external_aad: Bytes,
+    payload: String
+});
+
+impl MapSize for CardanoSignStructure {
+    fn map_size(&self) -> u64 {
+        4
+    }
+}
+
+impl<'b, C> minicbor::Decode<'b, C> for CardanoSignStructure {
+    fn decode(d: &mut Decoder<'b>, _ctx: &mut C) -> Result<Self, minicbor::decode::Error> {
+        let mut cardano_sign_structure = CardanoSignStructure::default();
+        cbor_array(d, &mut cardano_sign_structure, |_index, obj, d| {
+            let _index =
+                u8::try_from(_index).map_err(|e| minicbor::decode::Error::message(e.to_string()))?;
+
+            match _index {
+                KEY_CONTEXT => {
+                    obj.context = d.str()?.to_string().encode_to_vec()
+                }
+                KEY_PROTECTED_HEADER => {
+                    obj.protected_header = d.bytes()?.to_vec()
+                }
+                KEY_EXTERNAL_AAD => {
+                    obj.external_aad = d.bytes()?.to_vec()
+                }
+                KEY_PAYLOAD => {
+                    obj.payload = hex::encode(d.bytes()?);
+                }
+                _ => {
+                    d.skip()?;
+                }
+            }
+            Ok(())
+        })?;
+        Ok(cardano_sign_structure)
+    }
+}
+
+impl FromCbor<CardanoSignStructure> for CardanoSignStructure {
+    fn from_cbor(bytes: Vec<u8>) -> URResult<CardanoSignStructure> {
+        minicbor::decode(&bytes).map_err(|e| URError::CborDecodeError(e.to_string()))
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_decode_sign_structure() {
+        let sign_structure_str = "846a5369676e617475726531582aa201276761646472657373581de133a4f1f468454744b2ff3644b2ab79d48e76a3187f902fe8a1bcfaad4058857b22707572706f7365223a224b6f696f73204163636f756e7420566572696669636174696f6e222c226163636f756e74223a2265313333613466316634363834353437343462326666333634346232616237396434386537366133313837663930326665386131626366616164222c226e6f6e6365223a313731393533383936383333347d";
+        let sign_structure_bytes = hex::decode(sign_structure_str).unwrap();
+
+        let sign_structure = CardanoSignStructure::from_cbor(sign_structure_bytes).unwrap();
+        let payload = hex::decode(sign_structure.payload).unwrap();
+        let payload = String::from_utf8(payload).unwrap();
+        assert_eq!(payload, "{\"purpose\":\"Koios Account Verification\",\"account\":\"e133a4f1f468454744b2ff3644b2ab79d48e76a3187f902fe8a1bcfaad\",\"nonce\":1719538968334}");
+    }
+}
\ No newline at end of file
diff --git a/libs/ur-registry/src/cardano/mod.rs b/libs/ur-registry/src/cardano/mod.rs
index eb725b2..48a8e94 100644
--- a/libs/ur-registry/src/cardano/mod.rs
+++ b/libs/ur-registry/src/cardano/mod.rs
@@ -1,4 +1,7 @@
 pub mod cardano_cert_key;
 pub mod cardano_sign_request;
+pub mod cardano_sign_data_request;
 pub mod cardano_signature;
+pub mod cardano_sign_data_signature;
 pub mod cardano_utxo;
+pub mod cardano_sign_structure;
diff --git a/libs/ur-registry/src/macros_impl.rs b/libs/ur-registry/src/macros_impl.rs
index 524335d..5329cd0 100644
--- a/libs/ur-registry/src/macros_impl.rs
+++ b/libs/ur-registry/src/macros_impl.rs
@@ -8,6 +8,8 @@ use crate::bytes::Bytes;
 use crate::cardano::{
     cardano_cert_key::CardanoCertKey, cardano_sign_request::CardanoSignRequest,
     cardano_signature::CardanoSignature, cardano_utxo::CardanoUTXO,
+    cardano_sign_data_request::CardanoSignDataRequest,
+    cardano_sign_data_signature::CardanoSignDataSignature,
 };
 use crate::cosmos::{cosmos_sign_request::CosmosSignRequest, cosmos_signature::CosmosSignature};
 use crate::cosmos::{evm_sign_request::EvmSignRequest, evm_signature::EvmSignature};
@@ -50,6 +52,8 @@ impl_cbor_bytes!(
     CardanoSignature,
     CardanoUTXO,
     CardanoSignRequest,
+    CardanoSignDataRequest,
+    CardanoSignDataSignature,
     CardanoCertKey,
     AptosSignRequest,
     AptosSignature,
diff --git a/libs/ur-registry/src/registry_types.rs b/libs/ur-registry/src/registry_types.rs
index e012d55..201f565 100644
--- a/libs/ur-registry/src/registry_types.rs
+++ b/libs/ur-registry/src/registry_types.rs
@@ -13,6 +13,7 @@ pub enum URType {
     ArweaveSignRequest(String),
     AptosSignRequest(String),
     CardanoSignRequest(String),
+    CardanoSignDataRequest(String),
     CosmosSignRequest(String),
     EvmSignRequest(String),
     SuiSignRequest(String),
@@ -42,6 +43,7 @@ impl URType {
             "aptos-sign-request" => Ok(URType::AptosSignRequest(type_str.to_string())),
             "sui-sign-request" => Ok(URType::SuiSignRequest(type_str.to_string())),
             "cardano-sign-request" => Ok(URType::CardanoSignRequest(type_str.to_string())),
+            "cardano-sign-data-request" => Ok(URType::CardanoSignDataRequest(type_str.to_string())),
             "qr-hardware-call" => Ok(URType::QRHardwareCall(type_str.to_string())),
             "ton-sign-request" => Ok(URType::TonSignRequest(type_str.to_string())),
             _ => Err(URError::NotSupportURTypeError(type_str.to_string())),
@@ -63,6 +65,7 @@ impl URType {
             URType::ArweaveSignRequest(type_str) => type_str.to_string(),
             URType::AptosSignRequest(type_str) => type_str.to_string(),
             URType::CardanoSignRequest(type_str) => type_str.to_string(),
+            URType::CardanoSignDataRequest(type_str) => type_str.to_string(),
             URType::SuiSignRequest(type_str) => type_str.to_string(),
             URType::CosmosSignRequest(type_str) => type_str.to_string(),
             URType::EvmSignRequest(type_str) => type_str.to_string(),
@@ -135,6 +138,8 @@ pub const CARDANO_UTXO: RegistryType = RegistryType("cardano-utxo", Some(2201));
 pub const CARDANO_SIGN_REQUEST: RegistryType = RegistryType("cardano-sign-request", Some(2202));
 pub const CARDANO_SIGNATURE: RegistryType = RegistryType("cardano-signature", Some(2203));
 pub const CARDANO_CERT_KEY: RegistryType = RegistryType("cardano-cert-key", Some(2204));
+pub const CARDANO_SIGN_DATA_REQUEST: RegistryType = RegistryType("cardano-sign-data-request", Some(2205));
+pub const CARDANO_SIGN_DATA_SIGNATURE: RegistryType = RegistryType("cardano-sign-data-signature", Some(2206));
 // Sui
 pub const SUI_SIGN_REQUEST: RegistryType = RegistryType("sui-sign-request", Some(7101));
 pub const SUI_SIGNATURE: RegistryType = RegistryType("sui-signature", Some(7102));