Data type is changed when listening message from message queue in RabbitMQ 2.3.6 - rabbitmq

Question

I am using Spring Rabbit 2.3.6 for my spring application. I have list of Comment entity and send to message queue via this function
public void deletePost(long postId){
Post post = postRepository.findById(postId)
.orElseThrow(() -> new PostNotFoundException(String.valueOf(postId)));
List<Comment> comments = postBase.getComments(post);
postRepository.delete(post);
//post event
Map<String, Object> inputs= new HashMap<>();
inputs.put(InputParam.OBJECT_ID, postId);
inputs.put(InputParam.COMMENTS, comments);
messagingUtil.postEvent(SnwObjectType.POST, SnwActionType.DELETE, inputs);
}
Listening message
#RabbitListener(queues = MessagingConfig.QUEUE)
public void consumeMessageFromQueue(Map<String, Object> inputs) {
}
And this is data I received after listening message. Data type of each element in comment list have been changed, and I can't use it as Comment.
Have you any solution to data type from not being changed?
Updated: Messaging config
#Configuration
public class MessagingConfig {
public static final String QUEUE = "javatechie_queue";
public static final String EXCHANGE = "javatechie_exchange";
public static final String ROUTING_KEY = "javatechie_routingKey";
#Bean
public Queue queue() {
return new Queue(QUEUE);
}
#Bean
public TopicExchange exchange() {
return new TopicExchange(EXCHANGE);
}
#Bean
public Binding binding(Queue queue, TopicExchange exchange) {
return BindingBuilder.bind(queue).to(exchange).with(ROUTING_KEY);
}
#Bean
public MessageConverter converter() {
return new Jackson2JsonMessageConverter();
}
#Bean
public AmqpTemplate template(ConnectionFactory connectionFactory) {
final RabbitTemplate rabbitTemplate = new RabbitTemplate(connectionFactory);
rabbitTemplate.setMessageConverter(converter());
return rabbitTemplate;
}
}