curl --request GET \
  --url http://localhost:8080/notifications/subscriptions

{
  "items": [
    {
      "id": 123,
      "event_type": "<string>",
      "user_id": 123,
      "user_full_name": "<string>",
      "occurred_at": "2023-11-07T05:31:56Z",
      "created_at": "2023-11-07T05:31:56Z",
      "user_username": "<string>",
      "user_telegram_id": 123,
      "subscription_id": 123,
      "transaction_id": 123,
      "amount_kopeks": 123,
      "currency": "<string>",
      "message": "<string>",
      "extra": {}
    }
  ],
  "total": 123,
  "limit": 123,
  "offset": 123
}