{
  "id": "<string>",
  "type": "service-add-ons",
  "attributes": {
    "order_index": 123
  },
  "links": {
    "self": "<string>"
  },
  "relationships": {
    "resource": {
      "data": {
        "type": "<string>",
        "id": "<string>"
      },
      "links": {
        "self": "<string>"
      }
    },
    "add_on": {
      "data": {
        "type": "<string>",
        "id": "<string>"
      },
      "links": {
        "self": "<string>"
      }
    }
  }
}