How To configure REST adapter Which Accepts Request Body In "application/x-www-form-urlencoded" in O

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Hi All,

I am trying to invoke external REST endpoint to access a token information first. I was successfully able to invoke from POSTMAN. Attached is the screenshot of how i invoked from postman and I am trying to replicate the same from OIC. Here are the steps i followed.

1. I invoked from postman and took CURL commands from postman.
2. I took REST adapter and used Oauth Custom two legged flow security policy and configured as shown screenshot.
3. I have tested successfully.
4. I dragged the REST connection and configured REST adapter. Attached is the document about configuration

Below is the error i am getting when i am trying to invoke.