Hi Jesus,
I am afraid what you are referring to is not possible out of box in Muse. You either will need to use some CMS like business catalyst to update the data in the back end and that will reflect on the site or integrate your site with some live feed.
What muse can offer to help you with this, is an option to integrate the external html, which you can do via the 'object -> insert html' option or 'page properties -> metadata -> html for head' option.
- Abhishek Maurya