msc {

  wordwraparcs=true, hscale=2;

  Client,ClientMiddleware,ServerMiddleware,Server;

  Client->ClientMiddleware [ label="server.getBlogPosts()" ];
  ClientMiddleware->ClientMiddleware [ label="serializeCall('server.getBlogPosts')" ];
  ClientMiddleware->ServerMiddleware [ label="CALL getBlogPosts" ];
  ServerMiddleware->ServerMiddleware [ label="deserialize('CALL getBlogPosts')" ];
  ServerMiddleware->Server [ label="getBlogPosts()" ];
  Server->ServerMiddleware [ label="[{title: 'Article 1'}, {title: 'Article 2'}, ...]" ];
  ServerMiddleware->ServerMiddleware [ label="serializeResult([{title: 'Article 1'}, {title: 'Article 2'}, ...])" ];
  ServerMiddleware->ClientMiddleware [ label="RES <data...>" ];
  ClientMiddleware->ClientMiddleware [ label="deserializeResult('RES <data...>')" ];
  ClientMiddleware->Client [ label="[{title: 'Article 1'}, {title: 'Article 2'}, ...]" ];
}