$ sudo apt-get update
$ sudo apt-get install fwupdate-signed 

fwupdate-signed is installed in your system.

Make ensure the fwupdate-signed package were installed using the commands given below,

$ sudo dpkg-query -l | grep fwupdate-signed *

You will get with fwupdate-signed package name, version, architecture and description in a table

fwupdate-signed package basic information: