We have created many alerts with
"events": {
"arrival": true,
"cancelled": true,
"departure": true,
"diverted": true,
"filed": true,
"out": true,
"in": true,
"off": true,
"on": true,
"hold_start": false,
"hold_end": false
},
However, our system have not received the notification from FlightAware.