Fire events through External applications using TCP messages to trigger Ndisplay JSON Cluster Events

How do you fire json cluster events with third party (external) application on ndisplay using the port 41003 and the listener setup within it.

Has anyone tried to use this functionality? The documentation has pointed me in a direction however I’m not sure I’m doing it right. at the moment I’m just trying to fire an event from PuTTy or Netcat (TCP Communication tools) by sending a JSON string as given in the documentation to the port.

However it does not seem to receive it as it is not in the logs. Even though PuTTy and Ncat are able to connect to the port 41003 when the clusters are running?