There is an alternative solution bro: Take an USB drive, create a paste called "Music", and put your music tracks in there. Plug the USB drive on PS4. You can put as many as you wish as long as you have the files. It works in the same formats that PS3 used to have. It works as spotify: The music player doesn't detect if you are racing or not, so you will have to turn off the music menus or the custom music while at the menus.
Here it is one of many tutorials over the internet:
http://www.pushsquare.com/news/2014/10/guide_how_to_use_the_ps4s_usb_music_player
PS: You cannot creat playlists here. However, the system puts all musics in alphabetical order. So, if you rename the music´s file name, you can have as much playlists as you wish. For example, if you put "A1 - Oasis - Wonderwall", "A2 - Coldplay - Fix you", the player will put the A1 music first and then the other one, instead of putting the Coldplay one first because it starts with "C". You can create A,B,C,...Playlists, and also repeat the same music on various playlists, so this feature does work completely.