create, leave, delete
on channels or groups will be trackedpassword reset times, profile picture change,
etc.//piwik.rocket.chat/
17
[ { "trackerURL" : "https://my.piwik.domain2/" , "siteId" : 42 }, { "trackerURL" : "https://my.piwik.domain3/" , "siteId" : 15 } ]