- "2006-01-02 15:04:05 -0700" to unix timestamp - https://play.golang.org/p/HOsTs0uOG6g
- unix timestamp to ISO datetime - https://play.golang.org/p/dvHqJzTKTUo
- "2019-08-19T17:00:00.067Z" to unix timestamp in msec - https://play.golang.org/p/4nR6HA4V4Iu
- from
receivedAt
to prefix on s3 - https://play.golang.org/p/yEDEhBFmp73