$ sudo apt-get update
$ sudo apt-get install dovecot-managesieved 

dovecot-managesieved is installed in your system.

Make ensure the dovecot-managesieved package were installed using the commands given below,

$ sudo dpkg-query -l | grep dovecot-managesieved *

You will get with dovecot-managesieved package name, version, architecture and description in a table

dovecot-managesieved package basic information: