Hallo Vanja!
 
I hiked this trail on May 22nd this year. I recorded following GPS track:
http://stadtigel.bplaced.de/GPS/gps.htm?GPX=2023-05-17bis06-03_E4_Serbien.gpx
I corrected the path as I walked it. There were only a few markings. Therefore it is possible that I missed a variant.
 
I thought “Јама Леденица” was a proper noun. That's why I corrected the name. Please undo this, if it was wrong.
 
In the OSM wiki, "lwn" means a local route (https://wiki.openstreetmap.org/wiki/Tag:network%3Dlwn) and "rwn" means a regional route (https://wiki.openstreetmap.org/wiki/Tag:network%3Drwn). In my opinion "Tomićeva koliba – Jama Ledenica" is a local route. If the working group decides that my changes should be reverted, then I will accept that.
 
With friendly greetings
Stadtigel from Germany