curl --request GET \
  --url https://api-{region}-{cluster}.benchmarkemail.com/api/email/template/{id} \
  --header 'X-API-Key: <api-key>'

{
  "attributeIds": [
    "<string>"
  ],
  "design": "<string>",
  "html": "<string>",
  "id": "<string>",
  "imageUrl": "<string>",
  "lang": "<string>",
  "name": "<string>",
  "order": 2,
  "subject": "<string>",
  "unlayerId": "<string>"
}