{
  "external_order_ref": "TEST-WEB-ORDER-001",
  "currency_code": "GBP",
  "line_items": [
    {
      "external_line_ref": "TEST-WEB-LINE-001",
      "sku": "TEST-WEBSITE-SKU-001",
      "quantity": 1,
      "unit_price": 0
    }
  ]
}