Document templates and improve UI

I’m trying to experiment with the templates and cannot figure out how to access attributes correctly. Not only this, but the usage examples don’t work for the accounts I tried:

It’d be helpful to have this information documented somewhere and add some UI element that lets me view the raw JSON so I can reference the shape of data for accessing object attributes. Autocomplete suggestions in that would be helpful, but seeing the object in the view above would be really great!