Defination of payload

[SurajBhari]

I am new to this webdev thing. I was making a small project that requires me to send notification(s). I have managed to get through everything and get it to send notification.

Readme says "data" can be anything serial. even serialized JSON but when I send a message like this it arrives as it is

Is there any documents where you find the payload keys names?

my code is simple.

def send_web_push(subscription_information, message_body):
    return webpush(
        subscription_info=subscription_information,
        data=message_body,
        vapid_private_key=VAPID_PRIVATE_KEY,
        vapid_claims=VAPID_CLAIMS
    )

notification_payload = {
            "title": "New Video",
            "body": "New Video from xyz",
}
data = json.dumps(notification_payload)
send_web_push(sub, data)