curl --request POST \
  --url 'https://api.stateset.com/api/v1/inbound-shipments/{id}/in-transit' \
  --header "Authorization: Bearer $STATESET_API_KEY"

{
  "carrier": "UPS",
  "created_at": "2026-08-31T14:22:05Z",
  "id": "3fa85f64-5717-4562-b3fc-2c963f66afa6",
  "items": [
    {
      "id": "3fa85f64-5717-4562-b3fc-2c963f66afa6",
      "product_id": "3fa85f64-5717-4562-b3fc-2c963f66afa6",
      "quantity_expected": "string",
      "quantity_received": "string",
      "sku": "SKU-TENT-2P-GRN"
    }
  ],
  "number": "ORD-10042",
  "status": "pending",
  "supplier_id": "3fa85f64-5717-4562-b3fc-2c963f66afa6",
  "tracking_number": "1Z999AA10123456784"
}