ActivityStatistics(ActivityStatistics)

{
    "total_activities": 0,
    "published_activities": 0,
    "ongoing_activities": 0,
    "completed_activities": 0,
    "total_participants": 0,
    "average_participation_rate": 0,
    "total_revenue": 0,
    "popular_categories": [
        {
            "property1": "string",
            "property2": "string"
        }
    ],
    "activity_type_distribution": [
        {
            "property1": "string",
            "property2": "string"
        }
    ]
}