Provided hub.topic doesn't work

API
3

Thank you so much! I did

    data_raw = {
        "hub.callback" : "mycallback",
        "hub.mode" : "subscribe",
        "hub.lease_seconds" : "600",
        "hub.topic" : "https://api.twitch.tv/helix/users/follows?first=1&to_id=549320051"
    }

and it finally worked! I didn’t know I was supposed to be using JSON this whole time. Thanks!

Edit: For other python users submit the request using
r = requests.post(url=api_endpnt, data=data_raw, headers=head)