Convert Extended Event action mdmget_TimeStampUTC to datetime

SQL Server Extended Events can include an action of mdmtargetpkg.mdmget_TimeStampUTC. It returns a value such as 132085458320550473. How can that be converted to an actual date? It doesn't appear to be a valid Unix timestamp, even using microseconds. @@VERSION:

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Microsoft SQL Azure (RTM) - 12.0.2000.8 
	Jul  3 2019 10:02:53 
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