curl --request GET \
  --url http://localhost:7701/api/v1/subscriptions/coupons/{uuid} \
  --header 'X-API-Key: <api-key>'

{
  "data": {
    "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "code": "SUMMER20",
    "name": "20% off Summer Sale",
    "description": "<string>",
    "discount_type": "percentage",
    "discount_value": 20,
    "max_redemptions": 100,
    "redemptions_count": 5,
    "max_cycles": 3,
    "valid_from": "2023-11-07T05:31:56Z",
    "valid_until": "2023-11-07T05:31:56Z",
    "is_active": true,
    "created_at": "2023-11-07T05:31:56Z"
  }
}