Good question! I've taken a look and since artist profiles/manager profiles are logged into using a regular Spotify account, it's not possible to determine whether the user is an artist/manager at this moment.
If this is something you'd like to see, I recommend creating a new idea on the Ideas board. That way, Spotify can keep track of it.
Feel free to give me a shout, if you have any questions!
Hope you're having a great day,
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