Panel notifcation - how can i update gsettings to add 'skype'

Question

gsettings get com.canonical.Unity.Panel systray-whitelist

shows

['JavaEmbeddedFrame', 'Mumble', 'Wine', 'hp-systray', 'scp-dbus-service']

How can I make it be

['JavaEmbeddedFrame', 'Mumble', 'Wine', 'Skype', 'hp-systray', 'scp-dbus-service']

I tried
gsettings get com.canonical.Unity.Panel systray-whitelist ['JavaEmbeddedFrame', 'Mumble', 'Wine', 'Skype', 'hp-systray', 'scp-dbus-service']

but I seem to get an eror and it wasn't changed:-

Usage:
  gsettings set SCHEMA[:PATH] KEY VALUE

Set the value of KEY to VALUE

Arguments:
  SCHEMA    The name of the schema
  PATH      The path, for relocatable schemas
  KEY       The key within the schema
  VALUE     The value to set

Answer 1

Use

gsettings set com.canonical.Unity.Panel systray-whitelist "['JavaEmbeddedFrame', 'Mumble', 'Wine', 'Skype', 'hp-systray', 'scp-dbus-service']"

Have a look at Unsettings if you want to use a GUI for this.