Hello!
I was unable to use the POST request method in the «HTTP Request». That being said, the GET method works fine with the same web service.
When using the GET method, it works correctly (I erased personal data in the request):

Using the POST method:
The same query as in the picture above, but only the field is changed: Request Method: POST.
Returned response:
Why aren’t parameters passed in Request URL? I tried different setting values, but the parameters are not passed. The web service itself supports the POST method - when you enter a correct request with parameters in the browser under the current user, the method executes the procedure correctly.
Please help me set up a POST request.