I tried searching in the documentation, but I could not find what is the exact format of the JSON that the "Post data to HTTP End-Point" Action sends. Here it mentions it is "as defined by the variable in the Trigger". That means that it is not the same format as sent by the Device? Also, my device sends multiple variables, will this action only post the value of the single variable that triggers the Action?

If I use an Analysis, I can see from the console that I get the data of all the variables. But I am trying to avoid using Analysis as it does not scale well to the amount of data I expect to work with.