"transaction":
{
  "id": "add-items-to-basket",
  "arguments": [
    {
      "name": "user-id",
      "type": "guid"
    }
  ],
  "operations": [
    {
      "operationRefId": "catalog-get-items",
      "id": "op-1",
    },
    {
      "operationRefId": "basket-add-item",
      "id": "op-2",
      "providedValues": [
        {
	  "key": "buyerId",
          "value": "{{user-id}}"
        },
        {
          "key": "item-1",
          "value":
          {
            "id": "1",
            "productId": "{{item-1-id}}",
            "productName": "{{item-1-name}}",
            "unitPrice": "{{item-1-price}}",
            "oldUnitPrice": "{{item-1-price}}",
            "quantity": "{{item-1-available-stock}}",
            "pictureUrl": ""
          },
        },
        {
          "key": "item-2",
          "value":
          {
            "id": "2",
            "productId": "{{item-2-id}}",
            "productName": "{{item-2-name}}",
            "unitPrice": "{{item-2-price}}",
            "oldUnitPrice": "{{item-2-price}}",
            "quantity": "{{item-2-available-stock}}",
            "pictureUrl": ""
          },
        },
        {
          "key": "item-3",
          "value":
          {
            "id": "3",
            "productId": "{{item-3-id}}",
            "productName": "{{item-3-name}}",
            "unitPrice": "{{item-3-price}}",
            "oldUnitPrice": "{{item-3-price}}",
            "quantity": "{{item-3-available-stock}}",
            "pictureUrl": ""
          }
        }
      ]
    }
  ]
}