curl --request GET \
  --url https://api.example.com/cabinet/admin/campaigns/overview \
  --header 'Authorization: Bearer <token>'

{
  "total": 123,
  "active": 123,
  "inactive": 123,
  "total_registrations": 123,
  "total_balance_issued_kopeks": 123,
  "total_balance_issued_rubles": 123,
  "total_subscription_issued": 123,
  "total_tariff_issued": 0
}