You can specify the types of XML POST to add to the request. When specified XML content type is matched, the [xml1] section is added to the request buffer, and the content is inserted in it.
By default, some content types are automatically checked and captured. They do not must be added.
Depending on the type of JSON toolkit, the following content types can be displayed in the capture stream. If present, these types must be added.
application/x-javascripttext/javascripttext/x-javascripttext/x-json