Many thanks - I see.
I am just trying to get the “post” c# example running. So far is either gives me a “internal server error” or “Content type ‘text/plain;charset=utf-8’ not supported” error while I thought I set the content type already to
httpClient.DefaultRequestHeaders.TryAddWithoutValidation("Content-Type", "application/json; charset=utf-8");
Anyway - I will check again if I did a mistake in my code…