System.out.println(sendEvent);

logger.info(sendEvent);

import com.fasterxml.jackson.databind.ObjectMapper;
import java.io.IOException;
import java.io.StringReader;
import java.io.StringWriter;
import java.util.Properties;

public class Event {

    Properties properties;

    public Event() {
        this.properties = new Properties();
    }
    
    public Event(String jsonString) throws IOException {
        StringReader reader = new StringReader(jsonString);
        this.properties = new ObjectMapper()
                .readValue(reader, Event.class)
                .getProperties();
    } 

    public Properties getProperties() {
        return properties;
    }

    public void setProperties(Properties properties) {
        this.properties = properties;
    }

    @Override
    public String toString() {
        StringWriter writer = new StringWriter();
        try {
            new ObjectMapper().writeValue(writer, this);
        } catch (IOException ex) {
        }
        return writer.toString();
    }

}

import java.io.IOException;
import java.io.StringReader;
import java.io.StringWriter;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class JsonSerial {

    private static final Logger logger
            = LoggerFactory.getLogger(JsonSerial.class);

    public static void main(String[] args)
            throws IOException, JMSException, InterruptedException {
        Event sendEvent = new Event();
        sendEvent.getProperties().put("id", "12345678");
        sendEvent.getProperties().put("type", "transaction");
        sendEvent.getProperties().put("name", "identification");
        
        logger.info(sendEvent);
    }
}