Campaign

{
    "id": 1,
    "advert_id": 5,
    "advert_title": "Sample Ad",
    "broadcasting_type": "active_ad",
    "cpm": 1.5,
    "sending_limit": 1000,
    "sending_count": 250,
    "enabled": true,
    "created_at": "2024-01-01T00:00:00Z",
    "updated_at": "2024-01-15T10:30:00Z"
}