Is there macros for Escalation notes?

[neopug]

Hi,

We've just started using Zabbix for our environment and deploying Slack notification via actions and external script (zabbix-notify by Vitaly Zhuravlev).
It work fine except escalation notes.
We're using JSON template as message to make slack message more preaty. But when I disable any trigger Zabbix sends notification with adding escalation notes to the message body. That message brakes notification JSON.
So my question is there any macros for escalation notes? I tried to find it here but there is nothing looks like it.
Here is like ALERT.MESSAGE looks like.

[B]NOTE: Escalation cancelled: trigger "/var/xen/xc-install: Disk space is critically low" disabled.
[/B]{
            "fallback": "[[VTCORPTX2:/var/xen/xc-install: Disk space is critically low:PROBLEM]]",
            "pretext": "New Alarm",
            "author_name": "[[VTCORPTX2]]",
            "title": "[[/var/xen/xc-install: Disk space is critically low]]",
            "title_link": "http://10.101.1.99/zabbix/tr_events.php?triggerid=16381&eventid=258010",
            "text": "[[Last value: 100 %.]]",
            "fields": [
                {
                    "title": "Status",
                    "value": "PROBLEM",
                    "short": true
                },
                {
                    "title": "Severity",
                    "value": "Average",
                    "short": true
                },
                {
                    "title": "Time",
                    "value": "2017.10.31 11:15:03",
                    "short": true
                },
                {
                    "title": "EventID",
                    "value": "eventid: 258010",
                    "short": true
                }
            ]
        }

Thanks everyone :-)
P.S. I'm using Zabbix 3.4.3 Revision 73588