// запрос
{
    "cart": {
        "currency": "RUR",
        "delivery": {
            "region": {
                "id": 213,
                "name": "Москва",
                "parent": {
                    "id": 1,
                    "name": "Москва и Московская область",
                    "parent": {
                        "id": 3,
                        "name": "Центральный федеральный округ",
                        "parent": {
                            "id": 225,
                            "name": "Россия",
                            "type": "COUNTRY"
                        },
                        "type": "COUNTRY_DISTRICT"
                    },
                    "type": "SUBJECT_FEDERATION"
                },
                "type": "CITY"
            }
        },
        "items": [
            {
                "offerId": "312",
                "count": 1
            }
        ]
    }
}

// ответ
{
  "cart": {
    "deliveryCurrency": "RUR",
    "deliveryOptions": [],
    "items": [],
    "paymentMethods": [],
    "taxSystem": "ECHN"
  }
}