curl --request POST \
  --url https://app.useboom.ai/api/v1/cdp/custom-objects \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "type": "order",
  "externalId": "ord_998",
  "displayName": "Order #998",
  "attributes": {
    "total": 120.5,
    "status": "paid"
  }
}
'

{
  "type": "order",
  "externalId": "ord_998",
  "created": false
}