diff --git a/src/app/core/services/http-params-mapper.service.ts b/src/app/core/services/http-params-mapper.service.ts
index c440be0ec..5b20cc4e9 100644
--- a/src/app/core/services/http-params-mapper.service.ts
+++ b/src/app/core/services/http-params-mapper.service.ts
@@ -51,7 +51,7 @@ export class HttpRequestParamsMapper {
       [DataAddressProperty.pathSegments]: proxyPath ? pathSegments : null,
       [DataAddressProperty.queryParams]: proxyQueryParams ? queryParams : null,
       [DataAddressProperty.body]: proxyBody ? body : null,
-      [DataAddressProperty.mediaType]: proxyBody ? contentType : null,
+      [DataAddressProperty.contentType]: proxyBody ? contentType : null,
     });
   }
 
diff --git a/src/app/core/services/models/data-address-properties.ts b/src/app/core/services/models/data-address-properties.ts
index f02cc36d7..d92f3cf2f 100644
--- a/src/app/core/services/models/data-address-properties.ts
+++ b/src/app/core/services/models/data-address-properties.ts
@@ -6,7 +6,7 @@ export const DataAddressProperty = {
   baseUrl: `${EDC}baseUrl`,
   body: `${EDC}body`,
   header: `${EDC}header`,
-  mediaType: `${EDC}mediaType`,
+  contentType: `${EDC}contentType`,
   method: `${EDC}method`,
   pathSegments: `${EDC}pathSegments`,
   proxyBody: `${EDC}proxyBody`,
diff --git a/src/app/routes/connector-ui/asset-page/asset-create-dialog/asset-create-dialog.component.html b/src/app/routes/connector-ui/asset-page/asset-create-dialog/asset-create-dialog.component.html
index 07342e2d1..9aff4d102 100644
--- a/src/app/routes/connector-ui/asset-page/asset-create-dialog/asset-create-dialog.component.html
+++ b/src/app/routes/connector-ui/asset-page/asset-create-dialog/asset-create-dialog.component.html
@@ -190,7 +190,7 @@ <h1 mat-dialog-title>Create New Asset</h1>
             <mat-label>Custom Datasource Config (JSON)</mat-label>
             <textarea
               matInput
-              placeholder='{"properties": {"type": "HttpData", ...}}'
+              placeholder='{"https://w3id.org/edc/v0.0.1/ns/type": "HttpData", ...}'
               [formControl]="ctrl"></textarea>
             <mat-error *ngIf="ctrl.invalid && ctrl.errors?.jsonInvalid">
               {{ validationMessages.invalidJsonMessage }}
diff --git a/src/app/routes/connector-ui/contract-agreement-page/contract-agreement-transfer-dialog/contract-agreement-transfer-dialog.component.html b/src/app/routes/connector-ui/contract-agreement-page/contract-agreement-transfer-dialog/contract-agreement-transfer-dialog.component.html
index 60ca125cc..c504c65ba 100644
--- a/src/app/routes/connector-ui/contract-agreement-page/contract-agreement-transfer-dialog/contract-agreement-transfer-dialog.component.html
+++ b/src/app/routes/connector-ui/contract-agreement-page/contract-agreement-transfer-dialog/contract-agreement-transfer-dialog.component.html
@@ -23,7 +23,7 @@ <h1 mat-dialog-title>Initiate Transfer</h1>
         <mat-label>Custom Datasink Config (JSON)</mat-label>
         <textarea
           matInput
-          placeholder='{"properties": {"type": "HttpData", ...}}'
+          placeholder='{"https://w3id.org/edc/v0.0.1/ns/type": "HttpData", ...}'
           [formControl]="ctrl"></textarea>
         <mat-error *ngIf="ctrl.invalid && ctrl.errors?.jsonInvalid">
           {{ validationMessages.invalidJsonMessage }}
@@ -44,8 +44,8 @@ <h1 mat-dialog-title>Initiate Transfer</h1>
           {{ validationMessages.invalidJsonMessage }}
         </mat-error>
         <mat-hint>
-          JSON Fields "assetId", "contractId" and "connectorAddress" will be
-          overridden.
+          JSON-LD values for "edc:connectorId", "edc:contractId",
+          "edc:connectorId" and "edc:connectorAddress" will be overridden.
         </mat-hint>
       </mat-form-field>
 
diff --git a/src/app/routes/connector-ui/contract-agreement-page/contract-agreement-transfer-dialog/contract-agreement-transfer-dialog.component.ts b/src/app/routes/connector-ui/contract-agreement-page/contract-agreement-transfer-dialog/contract-agreement-transfer-dialog.component.ts
index da2259cd7..a23f7083a 100644
--- a/src/app/routes/connector-ui/contract-agreement-page/contract-agreement-transfer-dialog/contract-agreement-transfer-dialog.component.ts
+++ b/src/app/routes/connector-ui/contract-agreement-page/contract-agreement-transfer-dialog/contract-agreement-transfer-dialog.component.ts
@@ -122,9 +122,6 @@ export class ContractAgreementTransferDialogComponent implements OnDestroy {
       const customJson: any = JSON.parse(
         value.transferProcessRequest?.trim() ?? '',
       );
-      customJson.assetId = this.data.asset.assetId;
-      customJson.contractId = this.data.contractId;
-      customJson.connectorAddress = this.data.asset.connectorEndpoint;
 
       return {
         type: 'CUSTOM_JSON',