pratik@pandyaji:~$ sudo dpkg --add-architecture i386
pratik@pandyaji:~$ wget https://dl.winehq.org/wine-builds/Release.key
--2018-03-14 12:53:43--  https://dl.winehq.org/wine-builds/Release.key
Resolving dl.winehq.org (dl.winehq.org)... 151.101.128.69, 151.101.192.69, 151.101.0.69, ...
Connecting to dl.winehq.org (dl.winehq.org)|151.101.128.69|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 3122 (3.0K) [application/pgp-keys]
Saving to: 'Release.key.1’

Release.key.1       100%[===================>]   3.05K  --.-KB/s    in 0s

2018-03-14 12:53:43 (26.4 MB/s) - 'Release.key.1’ saved [3122/3122]

pratik@pandyaji:~$ ls Release.key.1
Release.key.1
pratik@pandyaji:~$ sudo apt-add-repository https://dl.winehq.org/wine-builds/ubuntu/
pratik@pandyaji:~$ sudo apt-get update

Reading package lists... Done
pratik@pandyaji:~$ sudo apt-get install --install-recommends winehq-stable
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 winehq-stable : Depends: wine-stable (= 3.0.0~xenial)
E: Unable to correct problems, you have held broken packages.