Hi Fabian Mendoza,
You can download the blog app from
http://stackideas.com/apps/item/5-blog.
After that install this blog app from your backend > Easysocial > Application > install > install completed > enable the blog app
Then double check with your integration setting is it enable or not from your backend > Easyblog > setting > integration > Easysocial
After you done, when your user publish a blog post, it will generate a stream in Easysocial dashboard. Hope this help.