Bugfix
If you pass a JSON object with a post request, it will not be announced in the content type of the request. This may cause the request to fail.
Workaround
In this case you can/must explicitly configure a header parameter and pass e.g. "application/json" as constant value.
Improvement
It's nice to be able to specify the content type explicitly, but if you don't, "application/json" should be set as the content type by default if there is a JSON object in the request content.
Test
No test