Creates an user notification rule

curl --request POST \
  --url https://api.rootly.com/v1/users/{user_id}/notification_rules \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/vnd.api+json' \
  --data '
{
  "data": {
    "type": "user_notification_rules",
    "attributes": {
      "enabled_contact_types": [
        "email"
      ],
      "delay": 123,
      "position": 123,
      "user_email_address_id": "<string>",
      "user_call_number_id": "<string>",
      "user_sms_number_id": "<string>",
      "user_device_id": "<string>"
    }
  }
}
'

{
  "data": {
    "id": "4d364ead-481a-4675-a76c-ca704a6b2dc1",
    "type": "user_notification_rules",
    "attributes": {
      "user_id": 1149,
      "delay": 2,
      "position": 1,
      "user_email_address_id": "4fd07457-65ae-427d-8b8b-3b5930ff7a02",
      "user_call_number_id": "fad77c18-bdf0-47f7-9f97-75ab345d0b9e",
      "user_sms_number_id": "fad77c18-bdf0-47f7-9f97-75ab345d0b9e",
      "user_device_id": "5888acdd-c285-4b3e-bb02-22d7f0d1facd",
      "enabled_contact_types": [
        "email"
      ],
      "notification_type": "quiet",
      "created_at": "2026-02-22T22:00:06.223-08:00",
      "updated_at": "2026-02-22T22:00:06.223-08:00"
    }
  }
}