curl --request POST \
  --url https://api.interchange.io/api/v2/buyer/advertisers/{advertiserId}/measurement-data/sync \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "measurements": [
    {
      "start_time": "2026-03-01T00:00:00-05:00",
      "end_time": "2026-03-07T23:59:59-05:00",
      "metric_id": "incremental_revenue",
      "metric_value": 8450.75,
      "unit": "currency",
      "currency": "USD",
      "campaign_id": "camp_456",
      "media_buy_id": "mb_789",
      "package_id": "pkg_001",
      "creative_id": "cr_002",
      "source": "advertiser",
      "source_platform": "billy_grace",
      "source_metric_name": "Incremental Revenue",
      "external_row_id": "bg_row_001"
    }
  ]
}
'

{
  "measurements": [
    {
      "index": 4503599627370495,
      "action": "created",
      "error": "<string>"
    }
  ]
}