title: Return json string grpc proto3
body: <p>How to write proto3 syntax with which proper json string is returned ?</p>
  <pre><code>message Response{
      string jsonString = 1;
  }
  rpc getSomeThing() { returns (Response) }
  </code></pre>
  <p><strong>Actual Response :</strong></p>
  <blockquote>
  <p>{   &quot;subject&quot;: &quot;dev&quot;,   &quot;body&quot;:
  &quot;{&quot;name&quot;:&quot;environment&quot;,&quot;description&quot;:&quot;The default
  environment&quot;}&quot;, }</p>
  </blockquote>
  <p><strong>Expected Response:</strong></p>
  <blockquote>
  <p>{   &quot;subject&quot;: &quot;dev&quot;,   &quot;body&quot;:
  {&quot;name&quot;:&quot;environment&quot;,&quot;description&quot;:&quot;The default environment&quot;}, }</p>
  </blockquote>