Receiving an error while registering the Third party API in Oracle Engagement Cloud

Summary

Getting an error while registering the Third party API in Application Composer

Content

Hello, 

I am trying to register the API which gives PDF file content in Json format as a response, while doing it I am receiving an application error in Application Composer. And if I save without giving the response in code sample it will get saved but while calling it from the button, I am getting 415 Unsupported Media Type error.

I tried to give the Headers in POSTMAN then I received the 415 Unsupported Media Type error, without any headers it works fine from postman

I have also tried to give below headers one by one in OEC, then too received same unsupported error.