curl --request GET \
  --url https://api.hubapi.com/integrators/timeline/v3/{appId}/event-templates/{eventTemplateId} \
  --header 'Authorization: Bearer <token>'

{
  "id": "<string>",
  "name": "<string>",
  "objectType": "<string>",
  "tokens": [
    {
      "label": "<string>",
      "name": "<string>",
      "options": [
        {
          "label": "<string>",
          "value": "<string>"
        }
      ],
      "createdAt": "2023-11-07T05:31:56Z",
      "objectPropertyName": "<string>",
      "updatedAt": "2023-11-07T05:31:56Z"
    }
  ],
  "createdAt": "2023-11-07T05:31:56Z",
  "detailTemplate": "<string>",
  "headerTemplate": "<string>",
  "updatedAt": "2023-11-07T05:31:56Z"
}