To add a track to your Public Tracks list first log into your eMastered account, and navigate to the "My Library," section from the top-right menu.

From here click on the track you wish to make public in the "My Tracks," section of the library, and click on the three dots icon to the right of the track. This button will be found near the "options," section of the center of the library.

From here click "Make This Track Public," and the track will then appear in your Public Tracks list.