Как передавать заявки из квиза через вебхуки

{
  "id": 12345,
  "quizId": 611,
  "answers": [
    {"q": "Какая услуга нужна?", "questionId": 10, "a": {"105575": "Ремонт кухни"}},
    {"q": "Что ещё важно?", "questionId": 11, "a": {"105580": "Срок", "custom": "Хочу успеть до Нового года"}},
    {"q": "Площадь, м²", "questionId": 12, "a": 45}
  ],
  "contacts": {
    "name": "Иван",
    "phone": "79991234567",
    "email": "example@gmail.com",
    "address": "Москва, ул. Примерная, 1",
    "text": "Нужна консультация",
    "messenger": {"type": "telegram", "value": "@username"},
    "messengerName": "Иван"
  },
  "created": "17.08.2019 22:41",
  "quizDurationSeconds": 95,
  "result": {
    "value": "15%",
    "title": "Ваша скидка",
    "description": "Завершите оформление"
  },
  "extra": {
    "href": "https://example.com/page",
    "ref": "https://google.com",
    "utm": {"utm_source": "google"},
    "cookies": {
      "_ga": "GA1.2.477745229.1562102022",
      "_ym_uid": "1562107156134812542"
    },
    "device": "mobile",
    "client": {"os": "iOS", "browser": "Safari"}
  },
  "version": 1
}

<?php
$body = file_get_contents('php://input');

// Проверка подписи: секрет из окна Webhooks (кнопка с ключом).
$secret = 'whsec_…';
$header = $_SERVER['HTTP_X_LEADFORMS_SIGNATURE'] ?? '';
$t = null; $sigs = [];
foreach (explode(',', $header) as $part) {
    [$k, $v] = array_pad(explode('=', trim($part), 2), 2, '');
    if ($k === 't') { $t = (int) $v; } elseif ($k === 'v1') { $sigs[] = $v; }
}
$expected = hash_hmac('sha256', $t . '.' . $body, $secret);
$valid = $t !== null && abs(time() - $t) <= 300
    && array_filter($sigs, fn ($s) => hash_equals($expected, $s));
if (!$valid) {
    http_response_code(401);
    exit;
}

$data = json_decode($body, true);

$answers = $data['answers'] ?? [];
$contacts = $data['contacts'] ?? [];

$phone = $contacts['phone'] ?? null;
$email = $contacts['email'] ?? null;
$name = $contacts['name'] ?? ($contacts['messengerName'] ?? null);
$messenger = $contacts['messenger'] ?? null; // ['type' => 'telegram', 'value' => '@username']
$address = $contacts['address'] ?? null;
$comment = $contacts['text'] ?? null;

// created в формате дд.мм.гггг чч:мм
$created = DateTime::createFromFormat('d.m.Y H:i', $data['created'] ?? '');
$utm = $data['extra']['utm'] ?? [];
$result = $data['result'] ?? null;
$quizDurationSeconds = $data['quizDurationSeconds'] ?? null;
$leadId = $data['id'] ?? null;
$quizId = $data['quizId'] ?? null;

// Ответы: $answer['a'] — объект «номер варианта => текст» или строка/число
foreach ($answers as $answer) {
    $text = is_array($answer['a']) ? implode(', ', $answer['a']) : (string) $answer['a'];
    // $answer['q'] — вопрос, $text — ответ
}

// Ваша логика обработки...

http_response_code(200);
exit;