SummaryTimelineData

{
    "summary_id": "string",
    "period_type": "string",
    "level": "string",
    "buckets": [
        {
            "property1": "string",
            "property2": "string"
        }
    ],
    "topics": [
        {
            "property1": "string",
            "property2": "string"
        }
    ]
}