SOLVED. How can I include JSON objects in the "API by Pabbly" action?

Hi! I'm trying to send JSON data using the "API by Pabbly" action, but I don't see a way to send objects. For example, how would I send this:

{
    "data": {
        "first_name": "Test",
        "last_name": "User",
        "email": "[email hidden]"
     },
}

I thought perhaps it would work like Uncanny Automator (using forward slashes), but that didn't work. Any help would be appreciated! Thanks!

NEVER MIND
I found my answer here: https://forum.pabbly.com/threads/how-to-send-json-payload-in-api.14612/