Sometimes things goes wrong, maybe it's your fault or maybe it's ours. The status code tells you who to blame.
It's your fault! Hopefully there will be some error messages telling you what went wrong, probably you missed a required field. Check the errors property on the response.
It's our fault! If the error keeps repeating we would appreciate if you could tell us and provide the Correlation Id provided in the response, this will help us investigate the problem.