curl --request GET \
  --url http://localhost:8080/cabinet/admin/tariffs/{tariff_id}/stats

{
  "id": 123,
  "name": "<string>",
  "subscriptions_count": 123,
  "active_subscriptions": 123,
  "trial_subscriptions": 123,
  "revenue_kopeks": 123,
  "revenue_rubles": 123
}