{
    "to":"<<FCMToken>>",
    "priority":"high",
    "notification":{
        "title":"<<Displayname-of-Caller>>",
        "text":"<<Date-and-time-of-call>>",
        "icon":"icon_notification_missed",
        "click_action":"MISSED_CALL"
    },
    "data":{
        "type":"sip-call-missed"
    }
}