try {
       $dto = $serializer->deserialize($request->getContent(), MyDto::class, 'json', [
            DenormalizerInterface::COLLECT_DENORMALIZATION_ERRORS => true,
            DenormalizerInterface::COLLECT_EXTRA_ATTRIBUTES_ERRORS => true,
            DenormalizerInterface::ALLOW_EXTRA_ATTRIBUTES => false,
        ]);
    } catch (PartialDenormalizationException $e) {
        $violations = new ConstraintViolationList();
        /** @var NotNormalizableValueException */
        foreach ($e->getErrors() as $exception) {
            $message = sprintf('The type must be one of "%s" ("%s" given).', implode(', ', $exception->getExpectedTypes()), $exception->getCurrentType());
            $parameters = [];
            if ($exception->canUseMessageForUser()) {
                $parameters['hint'] = $exception->getMessage();
            }
            $violations->add(new ConstraintViolation($message, '', $parameters, null, $exception->getPath(), null));
        };
        if (null !== $extraAttributesException = $e->getExtraAttributesError()) {
            foreach ($extraAttributesException->getExtraAttributes() as $extraAttribute) {
                $violations->add(new ConstraintViolation('This attribute is not allowed.', '', [], null, $extraAttribute, null));
            };
        }

        return $this->json($violations, 400);
    }