You can more easily identify payloads by opening your browser developer console (chrome: f12) and the go to the tab console. It allows you to type raw js commands there, for instance:
app.store.all('notifications');
will return for me
[]
However if I type:
app.store;
I see all bound models and data (which is RAW info).
I recommend running this on your dev environment, but this also works on this forum!