There is an easy way to interact with Easy Tables on Azure when you want to test things.
You can use a program like postman and create a post request for your table. For example if your table is named users, you should use users after tables/
I was testing some requests and I was dealing an exception and I figured that the request should contain the following things.
In the headers is necessary to add Content-Type and Zumo-Api-Version.
After that you should easily send your post request by selecting raw in the body section.