Get Geofence From Javascript SDK "messageRegistered" Event

Im tring to get the geofence that generates the message when a notification appears but im getting a payload like this:

{
  blink: number
  color: string
  f: number
  name: string
  nid: number
  p: {}
  rt: number
  t: number
  tp: string
  txt: string
  unit: number
  url: string
  x: number
  y: number
}

Im using the example from this url: https://sdk.wialon.com/playground/demo/ … tification and getting data from getData() method but theres not any reference to the geofence that generates de event, what can i do? (even if a need to make more request)
Thanks