将多维数组传递给CURLOPT_POSTFIELDS时出现数组到字符串的转换错误

$data = array(
    'name' => 'John Doe',
    'age' => 30,
    'email' => 'johndoe@example.com',
    'address' => array(
        'street' => '123 Main St',
        'city' => 'New York',
        'state' => 'NY'
    )
);

$queryString = http_build_query($data);

$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, 'http://example.com/api');
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, $queryString);
$result = curl_exec($ch);
curl_close($ch);