OrderItems

{
  "products": [
    {
      "id": "prod_123",
      "price": 5000,
      "quantity": 2,
      "name": "T-Shirt",
      "metadata": {
        "color": "Blue",
        "size": "L"
      }
    }
  ],
  "vat": {
    "amount": 750
  },
  "shipping": {
    "amount": 1000
  }
}