I don't know for sure. I would look at the community guidelines and see if it says anything about it. I think, emphasis on think, (I am by no means an expert, don't blame me if I'm wrong) that you can post it as long as you specify that it has explicit words in it. Once again, don't take my word for it. If I were you I would wait until one of the mods responds to your question with the old yea or nay.
Yeah, you can share your spotify playlist/songs as long as the swear words isn't the whole point of the song(eg. the song is about swearing). As whiteeagle said, you can give people a small heads up as well.