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": "d9476a1d-d614-447c-92f2-8bfd3158f4d7",
    "type": "user_notification_rules",
    "attributes": {
      "user_id": 1149,
      "delay": 2,
      "position": 1,
      "user_email_address_id": "59a7978b-a3d9-4e49-ab86-193626f8064c",
      "user_call_number_id": "d8be98d1-3f2a-479b-957e-666e2cced14d",
      "user_sms_number_id": "d8be98d1-3f2a-479b-957e-666e2cced14d",
      "user_device_id": "c9a0fd62-91ab-44f0-b751-6ff01f1f7458",
      "enabled_contact_types": [
        "email"
      ],
      "notification_type": "quiet",
      "created_at": "2026-02-19T19:14:53.068-08:00",
      "updated_at": "2026-02-19T19:14:53.068-08:00"
    }
  }
}