ExtEventInSchema(ExtEventInSchema)

{
    "activity_item_ids": [
        0
    ],
    "guest_user_ids": [
        0
    ],
    "customer_id": 0,
    "facility_ids": [
        0
    ],
    "custom_notifications": [
        {
            "arrival_number": 0,
            "arrival_unit": 1
        }
    ],
    "title": "string",
    "content": "string",
    "start_at": "2019-08-24T14:15:22.123Z",
    "end_at": "2019-08-24T14:15:22.123Z",
    "is_all_day": false,
    "place": "string",
    "color_code": "string",
    "update_range": 1
}