AssetBundle Export and Import: success but where is it?

Continued researching, ran across another forum post that describes a similar issue (related to export/import of an analysis rather than a dashboard):

I’m not sure I exactly understand what the response is suggesting – it says that the permissions need to be updated, but I can’t even find the new dashboard ARN, so don’t know what permissions to update. I really wish there was a comprehensive document that described the steps needed to perform this stuff.