The Offer service API supports JSON data serialization format.
The request format is specified by using the Content-Type header and is required for operations that have a request body.
The response format can be specified in requests either by using the Accept header or by adding a .json extension to the request URI. A response can be serialized by using a format that is different from the request. If conflicting formats are specified by using both an Accept header and a query extension, the query extension takes precedence.
If no response format is specified, JSON is the default.