Problem with reading metadata from VLC over D-Bus with nodejs and dbus-native.

vlc.js

'use strict';

// Before starting this script run VLC:
// vlc --control dbus http://212.96.160.160:7978/listen.pls

var Dbus = require('dbus-native');
var bus = Dbus.sessionBus();

// Works
bus.invoke({
  destination: 'org.mpris.MediaPlayer2.vlc',
//  destination: 'org.mpris.MediaPlayer2.vlc-' + <pid>,  // VLC sometimes opens only a connection with its PID in its name.
  path: '/org/mpris/MediaPlayer2',
  'interface': 'org.freedesktop.DBus.Properties',
  member: 'Get',
  signature: 'ss',
  body: [
    'org.mpris.MediaPlayer2.Player',
    'PlaybackStatus'
  ] 
}, function(err, data) {
  if (err) console.log('ERROR PlaybackStatus: ', err);
  else console.log('RESPONSE PlaybackStatus: ', JSON.stringify(data, null, 2));
});

// Doesn't work
bus.invoke({
  destination: 'org.mpris.MediaPlayer2.vlc',
//  destination: 'org.mpris.MediaPlayer2.vlc-' + <pid>,  // VLC sometimes opens only a connection with its PID in its name.
  path: '/org/mpris/MediaPlayer2',
  'interface': 'org.freedesktop.DBus.Properties',
  member: 'Get',
  signature: 'ss',
  body: [
    'org.mpris.MediaPlayer2.Player',
    'Metadata'
  ] 
}, function(err, data) {
  if (err) console.log('ERROR Metadata: ', err);
  else console.log('RESPONSE: Metadata', JSON.stringify(data, null, 2));
});