Execute a method when somebody is clicking on the chat

Hi guys,
I am programming a plugin for BungeeCord and i want that a method is execute if someone is clicking on the Chat. I allready searched on the internet, but i only fined, how i would do it in Bukkit. So my question is how can i do it on BungeeCord.
Yours faithfully, Simonsator

 

For all who don´t want to read the hole github project:

Code (Text):

String whatShouldBeWrittenIntoTheChat = "Something";
String command = "/something";
String hoverMessage="Click here to do something";
jsoncode = "{'text':'" + whatShouldBeWrittenIntoTheChat + "', 'clickEvent':{'action':'run_command','value':'" + command
           + "'},'hoverEvent':{'action':'show_text','value':'"+hoverMessage+"'}}";
player.unsafe().sendPacket(new Chat(jsoncode));

Of course you don´t need to make it with defining firstly all variables you can directly write it into player.unsafe().sendPacket(new Chat())