curl --request POST \
  --url 'https://prod-api.stateset.cloud.stateset.app/api/v1/asns/{id}/in-transit' \
  --header 'Authorization: Bearer YOUR_API_KEY' \
  --header 'Content-Type: application/json' \
  --data '{
  "carrier": {
    "carrier_name": "string",
    "service_level": "ground",
    "tracking_number": "1Z999AA10123456784"
  },
  "departure_time": "2026-08-31T14:22:05Z",
  "estimated_delivery": "2026-08-31T14:22:05Z",
  "version": 1
}'

{
  "data": {
    "asn_number": "string",
    "created_at": "2026-08-31T14:22:05Z",
    "expected_delivery_date": "2026-08-31T14:22:05Z",
    "id": "3fa85f64-5717-4562-b3fc-2c963f66afa6",
    "shipping_address": "548 Market St",
    "status": "pending",
    "supplier_id": "3fa85f64-5717-4562-b3fc-2c963f66afa6",
    "supplier_name": "string",
    "updated_at": "2026-08-31T14:22:05Z"
  },
  "errors": [
    "string"
  ],
  "message": "Two-person tent, green — replacement for damaged pole set.",
  "meta": {
    "request_id": "3fa85f64-5717-4562-b3fc-2c963f66afa6",
    "timestamp": "2026-08-31T14:22:05Z"
  },
  "success": true
}