How to send signal update contents immediately from Xibo Api to android xibo player?

hello, i need your support!!!

i had xibo android client install on 42 monitor and using xibo cms v1.8.3. I want to update contents using Xibo API (Text Widget) and send signal to Xibo android client to download contents change from xibo server.
what is method i can do that?

thanks for your help! :blush:

using XMR for update