Hi. I realized that there is a problem when retrieving the form-based request parameters performed with ajax. More details and my solution here: https://stackoverflow.com/questions/62971100/how-to-pass-a-non-url-request-parameter-to-smalltalk-teapot-from-ajax-call
Well, in fact, I had to extend the request class so I can access the znRequest instance to ask for the entity and its content.
Best,