curl --request POST \
  --url https://api.byblend.com/api/v1/notifications/sample \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
  "event_code": "order.shipped",
  "webhook_url": "https://example.com/webhook"
}'

{
  "event_code": "order.shipped",
  "payload_preview": {
    "carrier": "USPS",
    "created_at": "2025-07-31T17:13:13.520283",
    "estimated_delivery_date": "2025-07-31T17:13:13.520651",
    "service_level": "Ground Advantage",
    "status": "received",
    "tracking_number": "9200190347375200504724",
    "tracking_url": "https://tools.usps.com/go/TrackConfirmAction_input?origTrackNum=9200190347375200504724",
    "updated_at": "2025-07-31T17:13:13.520304",
    "url": "http://localhost:3000/shipments/46aaf265-60bb-4c34-bc08-be20e1628412"
  },
  "message": "Sample webhook sent successfully",
  "webhook_url": "https://example.com/webhook"
}