If you are using chrome,
This would format the JSON cleanly
This will let you inject your client ID or OAuth into headers. Also, you can select which API to by default.
https://chrome.google.com/webstore/detail/twitch-client-id-injector/okebcaancimcjdklkimjgcpcamnbkhli
If you want to look at the same information via helix, you will probably have to reformat your query…