Event registration ('created', 'updated')

Event registration updated requested subscribe example:

curl --location --request POST '/platform/v1/webhook/subscribe' \
--header 'Authorization: "Bearer API_TOKEN"'\
--header 'Content-Type: application/json' \
--data-raw '{
"event": "event_attendance/updated",
"target_url": "URL"
}'

Event registration updated response example:

{
  "entity_name": "event",
  "event_type": "updated",
  "data": {
    "business_id": "6rgsfuy8zb6il0b4",
    "event_attendance_id": "8lo5aj3phutlttsy",
    "client_id": "eho24gkjpvi03wne",
    "status": "cancelled",
    "event_title": "Yoga class",
    "start_time": "2019-11-15T15:00:00.000-06:00",
    "end_time": "2019-11-15T15:30:00.000-06:00",
    "interaction_type": "business_phone",
    "interaction_details": "NYC",
    "conversation_id": "d1hmz9sc5kafz8kn"
  }
}