diff --git a/pkg/config/ledger_config.go b/pkg/config/ledger_config.go
index 529a0d0176..f62f0e43fd 100644
--- a/pkg/config/ledger_config.go
+++ b/pkg/config/ledger_config.go
@@ -19,6 +19,8 @@ type Ledger struct {
 	// SkipBlockVerification allows to disable verification of received
 	// blocks (including cryptographic checks).
 	SkipBlockVerification bool `yaml:"SkipBlockVerification"`
+	// SaveInvocations enables contract smart contract invocation data saving.
+	SaveInvocations bool `yaml:"SaveInvocations"`
 }
 
 // Blockchain is a set of settings for core.Blockchain to use, it includes protocol
diff --git a/pkg/core/dao/dao_test.go b/pkg/core/dao/dao_test.go
index f57b4d3649..acc88c9ed7 100644
--- a/pkg/core/dao/dao_test.go
+++ b/pkg/core/dao/dao_test.go
@@ -196,6 +196,8 @@ func TestStoreAsTransaction(t *testing.T) {
 					Arguments: stackitem.NewArray([]stackitem.Item{
 						stackitem.NewBool(false),
 					}),
+					ArgumentsCount: 1,
+					IsValid:        true,
 				}},
 			},
 		}
diff --git a/pkg/core/interop/contract/call.go b/pkg/core/interop/contract/call.go
index 6c6bdc64a4..bc91010fc3 100644
--- a/pkg/core/interop/contract/call.go
+++ b/pkg/core/interop/contract/call.go
@@ -70,11 +70,23 @@ func Call(ic *interop.Context) error {
 	}
 	hasReturn := md.ReturnType != smartcontract.VoidType
 
-	ic.InvocationCalls = append(ic.InvocationCalls, state.ContractInvocation{
-		Hash:      u,
-		Method:    method,
-		Arguments: stackitem.NewArray(args),
-	})
+	if ic.Chain.GetConfig().Ledger.SaveInvocations {
+		arr := stackitem.NewArray(args)
+		arrCount := len(args)
+		valid := true
+		if _, err = ic.DAO.GetItemCtx().Serialize(arr, false); err != nil {
+			arr = stackitem.NewArray([]stackitem.Item{})
+			valid = false
+		}
+
+		ic.InvocationCalls = append(ic.InvocationCalls, state.ContractInvocation{
+			Hash:           u,
+			Method:         method,
+			Arguments:      arr,
+			ArgumentsCount: uint32(arrCount),
+			IsValid:        valid,
+		})
+	}
 	return callInternal(ic, cs, method, fs, hasReturn, args, true)
 }
 
diff --git a/pkg/core/state/notification_event.go b/pkg/core/state/notification_event.go
index 9fdd38b2e8..17619de68e 100644
--- a/pkg/core/state/notification_event.go
+++ b/pkg/core/state/notification_event.go
@@ -21,9 +21,11 @@ type NotificationEvent struct {
 }
 
 type ContractInvocation struct {
-	Hash      util.Uint160     `json:"contract_hash"`
-	Method    string           `json:"method"`
-	Arguments *stackitem.Array `json:"arguments"`
+	Hash           util.Uint160     `json:"contract_hash"`
+	Method         string           `json:"method"`
+	Arguments      *stackitem.Array `json:"arguments"`
+	ArgumentsCount uint32           `json:"arguments_count"`
+	IsValid        bool             `json:"is_valid"`
 }
 
 func (ci *ContractInvocation) DecodeBinary(r *io.BinReader) {
@@ -39,6 +41,8 @@ func (ci *ContractInvocation) DecodeBinary(r *io.BinReader) {
 		return
 	}
 	ci.Arguments = stackitem.NewArray(arr)
+	ci.ArgumentsCount = r.ReadU32LE()
+	ci.IsValid = r.ReadBool()
 }
 
 func (ci *ContractInvocation) EncodeBinaryWithContext(w *io.BinWriter, sc *stackitem.SerializationContext) {
@@ -50,6 +54,8 @@ func (ci *ContractInvocation) EncodeBinaryWithContext(w *io.BinWriter, sc *stack
 		return
 	}
 	w.WriteBytes(b)
+	w.WriteU32LE(ci.ArgumentsCount)
+	w.WriteBool(ci.IsValid)
 }
 
 // MarshalJSON implements the json.Marshaler interface.
@@ -59,9 +65,11 @@ func (ci ContractInvocation) MarshalJSON() ([]byte, error) {
 		item = []byte(fmt.Sprintf(`"error: %v"`, err))
 	}
 	return json.Marshal(ContractInvocationAux{
-		Hash:      ci.Hash,
-		Method:    ci.Method,
-		Arguments: item,
+		Hash:           ci.Hash,
+		Method:         ci.Method,
+		Arguments:      item,
+		ArgumentsCount: ci.ArgumentsCount,
+		IsValid:        ci.IsValid,
 	})
 }
 
@@ -81,6 +89,8 @@ func (ci *ContractInvocation) UnmarshalJSON(data []byte) error {
 	ci.Arguments = params.(*stackitem.Array)
 	ci.Method = aux.Method
 	ci.Hash = aux.Hash
+	ci.ArgumentsCount = aux.ArgumentsCount
+	ci.IsValid = aux.IsValid
 	return nil
 }
 
@@ -286,9 +296,11 @@ type Execution struct {
 }
 
 type ContractInvocationAux struct {
-	Hash      util.Uint160    `json:"contract_hash"`
-	Method    string          `json:"method"`
-	Arguments json.RawMessage `json:"arguments"`
+	Hash           util.Uint160    `json:"contract_hash"`
+	Method         string          `json:"method"`
+	Arguments      json.RawMessage `json:"arguments"`
+	ArgumentsCount uint32          `json:"arguments_count"`
+	IsValid        bool            `json:"is_valid"`
 }
 
 // executionAux represents an auxiliary struct for Execution JSON marshalling.