Test: Update usage example for testing

src/in_soundcard.liq

@@ -25,9 +25,9 @@
 
 usage_set_track_metadata = "set_track_metadata { \
         \"show_name\": \"Analog Ambient\", \
-        \"show_id\": -1, \
-        \"timeslot_id\": -1, \
-        \"playlist_id\": -1, \
+        \"show_id\": 111, \
+        \"timeslot_id\": 222, \
+        \"playlist_id\": 333, \
         \"playlist_item\": \"\", \
         \"track_type\": 2, \
         \"track_start\": \"2022/02/22 22:02:22\", \