"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": "@@op-1.response[0].id@@",
            "productName": "@@op-1.response[0].name@@",
            "unitPrice": "@@op-1.response[0].price@@",
            "oldUnitPrice": "@@op-1.response[0].price@@",
            "quantity": "@@op-1.response[0].availablestock@@",
            "pictureUrl": ""
          },
        },
        {
          "key": "item-2",
          "value": 
          {
            "id": "2",
            "productId": "@@op-1.response[1].id@@",
            "productName": "@@op-1.response[1].name@@",
            "unitPrice": "@@op-1.response[1].price@@",
            "oldUnitPrice": "@@op-1.response[1].price@@",
            "quantity": "@@op-1.response[1].availablestock@@",
            "pictureUrl": ""
          },
        },
        {
          "key": "item-3",
          "value":         
          {
            "id": "3",
            "productId": "@@op-1.response[2].id@@",
            "productName": "@@op-1.response[2].name@@",
            "unitPrice": "@@op-1.response[2].price@@",
            "oldUnitPrice": "@@op-1.response[2].price@@",
            "quantity": "@@op-1.response[2].availablestock@@",
            "pictureUrl": ""
          }
        }
      ]
    }
  ]
}