Get a Service by its external reference id

Example response

{
  "data": {
    "id": "<ULID>",
    "name": "Software development",
    "ext_tool_id": 24,
    "info": "Software Development services",
    "color": "#000000",
    "active": true,
    "billable": true,
    "acronym": "Dev",
    "image_id": "<ULID>",
    "default_time_entry_description": "Maintenance done which was planed on date yyyy/mm/dd."
  }
}