CheckoutRequest

{
    "event": "summer-gala",
    "items": [
        {
            "tier": "vip",
            "quantity": 2
        }
    ],
    "seats": [
        "SEC_A_3_7",
        "SEC_A_3_8"
    ],
    "promoCode": "EARLYBIRD",
    "customer": {
        "name": "Aysel Məmmədova",
        "email": "aysel@example.com",
        "phone": "+994501234567"
    },
    "answers": {
        "q1": "Acme LLC"
    },
    "returnUrl": "https://example.com/thanks",
    "lang": "az"
}