executeSubRequest example

$payload = $action->asPayload();
        $payload['meta'] = [
            'timestamp' => (new \DateTime())->getTimestamp(),
            'reference' => Uuid::randomHex(),
            'language' => $context->getLanguageId(),
        ];

        $appSecret = $action->getAppSecret();

        if (!$appSecret || str_starts_with($action->getTargetUrl(), '/')) {
            $content = $this->executeSubRequest($action);
        } else {
            $content = $this->executeHttpRequest($action, $context, $payload, $appSecret);
        }

        if (empty($content)) {
            return new JsonResponse();
        }

        $content = json_decode($content, true, 512, \JSON_THROW_ON_ERROR);

        if (!\array_key_exists('actionType', $content) || !\array_key_exists('payload', $content)) {