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

{
  "id": 123,
  "name": "<string>",
  "start_parameter": "<string>",
  "bonus_type": "balance",
  "is_active": true,
  "created_at": "2023-11-07T05:31:56Z",
  "balance_bonus_kopeks": 0,
  "balance_bonus_rubles": 0,
  "subscription_duration_days": 123,
  "subscription_traffic_gb": 123,
  "subscription_device_limit": 123,
  "subscription_squads": [
    "<string>"
  ],
  "tariff_id": 123,
  "tariff_duration_days": 123,
  "tariff": {
    "id": 123,
    "name": "<string>"
  },
  "partner_user_id": 123,
  "partner_name": "<string>",
  "created_by": 123,
  "updated_at": "2023-11-07T05:31:56Z",
  "deep_link": "<string>",
  "web_link": "<string>"
}