Retrieves an incident event service

curl --request GET \
  --url https://api.rootly.com/v1/incident_event_services/{id} \
  --header 'Authorization: Bearer <token>'

{
  "data": {
    "id": "e98e5775-c985-44ae-a901-11e5d57303d5",
    "type": "incident_event_services",
    "attributes": {
      "incident_event_id": "812a796f-83ad-400c-b577-76022b8c4ac4",
      "service_id": "d6e2b784-a72b-49b2-9d46-a0056f31a75f",
      "status": "partial_outage"
    }
  }
}