Changes to Upload an asset (single-call multipart)

added the new optional request property expires_in

added the optional property expires_at to the response with the 200 status

added the optional property expires_at to the response with the 201 status

added the optional property job_id to the response with the 200 status

added the optional property job_id to the response with the 201 status

removed the success response with the status 202

added the non-success response with the status 500