curl --request GET \
  --url https://api.hubapi.com/data-studio/data-source/2026-09-beta/{datasourceId} \
  --header 'Authorization: Bearer <token>'

{
  "columns": [
    {
      "name": "<string>",
      "type": "<string>"
    }
  ],
  "createdAt": "<string>",
  "datasourceId": 123,
  "datasourceName": "<string>"
}