Spotify SDE Playlist Contents for use in Recommendation App

[xentnex]

Plan

Free/Premium

Country

Turkey

Operating System

(iOS, Android)

My Question or Issue

We have plans for using Spotify Developer API in our mobile app for ios and android platforms. Our app will be generating a Playlist by getting user's playlist from Spotify with Spotify Developer API and saving the generated playlist again on Spotify.. So the questions are below:

1. Is it a legal to use user's playlist data from Spotify API ?

2. Is it legal to recommend a new playlist upon playlist data from Spotify API ?

3. Is it legal to save the user's Spotify playlist data on our backend servers ?

4. Can we get a permission from you if all above are possible ?