Getting "missing or unparseable subscription condition" on EventSubs

API
3

Hello, and thank you for the response. I have been trying to get this to work, and even with simply:

let sub = {
  version: "1",
  type: "channel.follow",
  condition: {
  	broadcaster_user_id:id
  },
  transport: {
    method: "webhook",
    callback: "https://events.hookdeck.com/e/src_mnIcaKuCZVjRaKLupNqFCjOq",
    secret: process.env.SUB_SECRET
  }
};
fetch ("https://api.twitch.tv/helix/eventsub/subscriptions", {
  method:'POST',
	  headers: {
	'Client-ID': process.env.CLIENT_ID,
	'Authorization': process.env.TOKEN,
	'Content-Type': 'application/json'
  },
  body:JSON.stringify(sub)

} )
.then(res => res.json())
.then(data => console.log(data));

With id having a valid value. I get the same error.