public function onPayboxIpnResponse(PayboxResponseEvent $event)
    {
        $path = sprintf('%s/../data/%s', $this->rootDir, date('Y\/m\/d\/'));
        $this->filesystem->mkdir($path);

        $content = sprintf('Signature verification : %s%s', $event->isVerified() ? 'OK' : 'KO', PHP_EOL);
        foreach ($event->getData() as $key => $value) {
            $content .= sprintf("%s:%s%s", $key, $value, PHP_EOL);
        }

        file_put_contents(
            sprintf('%s%s.txt', $path, time()),
            $content
        );
    }