{
  "campaignIds": [
    "500123"
  ],
  "startDate": "2026-03-01",
  "endDate": "2026-03-31",
  "dimensions": [
    "date",
    "campaign"
  ],
  "metrics": [
    "impressions",
    "clicks",
    "roas"
  ],
  "format": "json"
}