To resolve this issue, add a Content-Type HTTP request header with a supported media type.
When the API reports an unsupported media type, it means that the content of the entity the user submitted with the API request does not have a supported media type.
An API request's media type is determined by its Content-Type header. All HumanGraphics API requests that take a request body use the JSON media type. Therefore, all API requests that include an entity must include an HTTP request header "Content-Type: application/json". If the charset is not given, then the API assumes it is UTF-8.