[ProtocolLib] Send JSON chat message packet?

Hello guys!
So, like many people out there the new 1.7.2 builds have been very exciting to me. I have been trying to solve the new chat message formatting. I've been using protocol lib 3.0.1, but am stuck with a nullpointerexception. Here's the source:

Code:

if (sender instanceof Player) {
PacketContainer chatMessage = protocolManager.createPacket(PacketType.Play.Server.CHAT);
chatMessage.getChatComponents().read(0).setJson("{text:\"CLICK\",clickEvent:{action:run_command,value:\"This is a test\"}");
try {
protocolManager.sendServerPacket((Player) sender, chatMessage);
} catch (InvocationTargetException e) {
e.printStackTrace();
}
}

I am getting my errors on the "chatMessage.getChatComponents" part... I don't know what I am doing wrong.

Any help would be appreciated. Thanks in advanced!