I found out how to get it Metric Aggregates

    "data": {
        "type": "metric-aggregate",
        "attributes": {
            "measurements": :
                "sum_value"
            ],
            "filter": :
                "greater-or-equal(datetime,2024-08-01)",
                "less-than(datetime,2024-08-30)"
            ],
            "by": :
            "$attributed_message"
],
            "interval": "month",
            "metric_id": "Placed Order",
            "page_size": 500
        }
    }
}