Voice User-Defined Message: Invalid Content-Type

Invalid Content-Type in the POST request to the UserDefinedMessage Resource. Only application/json is supported.

• Value of Content-Type in the POST request to the UserDefinedMessage Resource is not as expected, or there is no Content-Type header in the request.

• Make sure that Content-Type Header is included in the POST request to the UserDefinedMessage Resource and the value of the Content-Type Header is application/json.