curl --request GET \
  --url https://api.nedzo.ai/v1/custom-field/{id} \
  --header 'Authorization: Bearer <token>'

{
  "status_code": 123,
  "message": "<string>",
  "data": {
    "custom_field": {
      "name": "<string>",
      "description": "<string>",
      "field_key": "<string>",
      "data_type": "<string>",
      "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "subaccount_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a"
    }
  }
}