Supported Content-types and Accept Headers

HTTP Method	Content-types	Accept Headers
GET	application/x-www-form-urlencoded	application/json application/xml or text/xml multipart/form-data or multipart/mixed
POST	application/json application/xml or text/xml multipart/form-data or multipart/mixed application/x-www-form-urlencoded	application/json application/xml or text/xml multipart/form-data or multipart/mixed
PUT	application/json application/xml or text/xml multipart/form-data or multipart/mixed application/x-www-form-urlencoded	application/json application/xml or text/xml multipart/form-data or multipart/mixed
DELETE	application/x-www-form-urlencoded	application/json application/xml or text/xml multipart/form-data or multipart/mixed

Note:
If a content-type is not specified, then the request verifies the value of the Set Media Type parameter. If the value of the Set Media Type parameter is not defined, then by default, for POST and PUT HTTP methods, the application/json content-type is used. Whereas for GET and DELETE HTTP methods, the application/x-www-form-urlencoded content-type is used.