InitWidgetDto

{
    "external_id": "user_12345",
    "user_hash": "a1b2c3d4e5f6a1b2c3d4e5f6a1b2c3d4e5f6a1b2c3d4e5f6a1b2c3d4e5f6a1b2",
    "email": "user@example.com",
    "phone": "+79991234567",
    "first_name": "Иван",
    "last_name": "Петров",
    "avatar_url": "https://example.com/avatar.jpg",
    "data": {
        "plan": "premium",
        "subscription_expires": "2025-12-31T23:59:59Z",
        "tags": [
            "vip",
            "early_adopter"
        ],
        "cart": {
            "items_count": 3,
            "total_amount": 5000,
            "currency": "RUB"
        },
        "utm_source": "google"
    }
}