How to add my Spotify Follow Button in Spotify Community posts

[davidgbonacho]

Hi!
I can not find a way to embed my Spotify artist follow button into a post message in Spotify community. 
 
if I put an iframe, an HTML error is shown when I try to post, so I try to follow the steps shown here: https://community.spotify.com/t5/Spotify-Answers/How-do-I-embed-music-or-a-follow-button-in-the-Comm...
 
... but if I insert a link with my URI, nothing happens but a playlist appears.
 
In addition, I can not find the Signature field in My Settings / Personal information...
(unless the field is wearing an invisibility cloak)
 
Thanks for your help!

[davidgbonacho]

Please do not everyone answer at the same time, to avoid blocking the Internet.