curl --request POST \
  --url https://api.agentic.scope3.com/api/v2/buyer/advertisers/{advertiserId}/measurement-sources \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "sourceKey": "<string>",
  "name": "<string>",
  "outcomeType": "<string>",
  "granularity": "<string>",
  "cadence": "continuous",
  "provider": "<string>"
}
'

{
  "data": null,
  "error": {
    "code": "<string>",
    "message": "<string>",
    "field": "<string>",
    "details": {}
  }
}