There were a number of new features introduced in Ops Center 12.2.2. One of the shiny ones is an expansion of the backup and recovery capabilities to include Proxy Controllers.
It's always been possible to create a backup of the Enterprise Controller and the co-located Proxy Controller using the ecadm backup command. Now, in version 12.2.2, there's a similar command - proxyadm backup - to create a backup of a Proxy Controller, including all of its asset data. You can save off this file and use it to restore the Proxy Controller to its backed-up state.
The only trick with OC backups is that the OS images directory isn't part of the backup file for size reasons, but they can be backed up separately.
The Backup and Recovery chapter of the Administration guide explains how to back up your Proxy Controllers and Enterprise Controller, and the What's New goes over many of the other new features in 12.2.2.