curl --request GET \
  --url http://localhost:8080/cabinet/admin/campaigns

{
  "campaigns": [
    {
      "id": 123,
      "name": "<string>",
      "start_parameter": "<string>",
      "bonus_type": "balance",
      "is_active": true,
      "registrations_count": 123,
      "created_at": "2023-11-07T05:31:56Z",
      "total_revenue_kopeks": 0,
      "conversion_rate": 0,
      "partner_user_id": 123,
      "partner_name": "<string>"
    }
  ],
  "total": 123
}