Yeah, try this:
$ snap download hello-world
Fetching snap "hello-world"
Fetching assertions for "hello-world"
kyrofa@Pandora:~$ sudo snap ack hello-world_27.assert
kyrofa@Pandora:~$ sudo snap install hello-world_27.snap
hello-world 6.3 from 'canonical' installed
kyrofa@Pandora:~$ snap list
Name Version Rev Developer Notes
<snip>
hello-world 6.3 27 canonical -
Note that this will provide the ability to update. All you need are the snap and the assertion provided by snap download
.