title: Can't convert value of class org.json.JSONObject to class org.apache.kafka.common.serialization.StringSerializer/ JsonSerializer
body: <p>How looks my configurations:</p>
  <pre><code>Map&lt;String, Object&gt; props = kafkaProperties.buildProducerProperties();
  
  props.put(&quot;key.serializer&quot;, &quot;org.apache.kafka.common.serialization.StringSerializer&quot;);
  props.put(&quot;value.serializer&quot;, &quot;org.apache.kafka.common.serialization.StringSerializer&quot;);
  </code></pre>
  <p>Which serializer should i use for JSONObject?</p>
  <p>Should i send by kafkaTemplate JsonObject to it would be better to send String? (jsonObject.toString());</p>