This function returns restore conditions by id.
jetapi backup -F getRestoreCondition -D '_id=5b66bb09d5ac5e1c714985e2'
https://hostname.example.com:2087/cpsess##########/cgi/addons/jetbackup/api.cgi?function=getRestoreCondition&_id=5b66bb09d5ac5e1c714985e2