How do I do this?[Solved]

This is a JSON file. For it work you must have 3 things.

1. 1 JSON file.
2. 1 JSON object to contain the JSON file after you load it.
3. The AJAX object to load the JSON file and put it in the JSON object.

EDIT: After the load, you'll interact with the JSON object. Consider the JSON file an initial state of what you need. Also, you can work with only the JSON object from the start and never use a JSON file or the AJAX object, you just add the data you need from event sheets, but then you won't be able to use the editor like in the picture.

You can check out how on the official C3 tutorials.