curl --request POST \
  --url 'https://prod-api.stateset.cloud.stateset.app/api/v1/asns/{id}/items' \
  --header 'Authorization: Bearer YOUR_API_KEY' \
  --header 'Content-Type: application/json' \
  --data '{
  "country_of_origin": "US",
  "customs_value": 49,
  "expiration_date": "2026-08-31T14:22:05Z",
  "lot_number": "string",
  "package_number": "string",
  "purchase_order_item_id": "3fa85f64-5717-4562-b3fc-2c963f66afa6",
  "quantity_shipped": 1,
  "serial_numbers": [
    "string"
  ]
}'

{
  "data": {
    "asn_id": "3fa85f64-5717-4562-b3fc-2c963f66afa6",
    "id": "3fa85f64-5717-4562-b3fc-2c963f66afa6",
    "lot_number": "string",
    "package_number": "string",
    "purchase_order_item_id": "3fa85f64-5717-4562-b3fc-2c963f66afa6",
    "quantity_shipped": 1,
    "serial_numbers": [
      "string"
    ],
    "status": "pending"
  },
  "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
}