Create Response to Negotiation via REST API gives Error 27503

Summary:

Please see post In Integration and Extensions:

https://community.oracle.com/customerconnect/discussion/684596/how-to-use-fusion-rest-draftsuppliernegotiationresponses-action-createnegotiationresponse/

Content (required):

Invoking REST API based on Oracle documentation : https://docs.oracle.com/en/cloud/saas/procurement/23b/fapra/op-draftsuppliernegotiationresponses-action-createnegotiationresponse-post.html

Getting error : 27503 "The request content does not represent an action or it has an invalid structure."

Version (include the version you are using, if applicable):

23B

Code Snippet (add any code snippets that support your topic, if applicable):

Please see post In Integration and Extensions:

https://community.oracle.com/customerconnect/discussion/684596/how-to-use-fusion-rest-draftsuppliernegotiationresponses-action-createnegotiationresponse/