Changes to List of rates

the request response's property type changed from string to object for status 400

removed the required property error_class from the response with the 400 status

removed the required property error_message from the response with the 400 status

added the required property class to the response with the 400 status

added the required property documentation_url to the response with the 400 status

added the required property message to the response with the 400 status

added the required property request_id to the response with the 400 status