Ok, I fixed it by giving the command to remove (clear all) and add notification.

Ok, I i found the json string to use ( 127.0.0.1:8080/json.htm?devidx=77&idx=56&param=updatenotification&tmsg=Attivo&tpriority=1&tsendalways=true&tsystems=pushbullet&ttype=7&tvalue=1&twhen=0&type=command) , but now i have another problem, the notification idx value changes every time, how can i fix ...

Hi to all, can you help me create a script to change with a virtual switch the active system notification of some other switches? in a nutshell I would like to change with a single switch the notification system of several other switches (from pushbullet to kodi) without having to do it manually ...