Register a callback url for notifications.

Subscriptions (or webhooks) serve to specify a callback url that should be invoked when an event occurs.

POST /subscriptions

Request:

{
    "eventType": "string",
    "callback_url": "string"
}

EXAMPLE

server = https://url:port/tmining/api/v1

The following event types are currently supported:

1. onRelease

2. onAcceptInvitation