curl -X GET https://api.mailofly.com/topics/top_123 \
  -H "Authorization: Bearer mf_live_your_api_key"

{
  "data": {
    "id": "top_123",
    "name": "Product Updates",
    "description": "Weekly digests on new features and product improvements",
    "defaultStatus": "opt_in"
  }
}