POST request node not recognizing body

I am trying to execute a request that works in postman, however when I try it in the Knime POST Request, it is giving me the AADSTS900144 error: “The request body must contain the following parameter”.

Could someone tell me what is wrong with my json body? Obviously I replaced the id’s and secrets with “xxx” in the workflow attached.

web_services_knime.knwf