Last week Tijana Bogićević was announced as the Serbian representative and now, exactly a week later we get a first sneak peek on the song.
Eurovision.tv has uploaded part of the instrumental of the song:

This also gives us the song’s title: In Too Deep.
The song was written by Borislav Milanov, Bo Persson, Johan Alkenas and Lisa Ann-Mari Linder. The first two have also been co-authors for Poli’s If Love Was A Crime last year. These four writers are the founders of a collective called ”Symphonix International”.

The song is expected to be out soon and will compete for Serbia in the second semi-final on the 11th of May in Kyiv.