Catalogs represent a means to organise your albums and tracks in distinct collections.
In other words, user can divide their albums and tracks amongst various catalogs. They can create these catalog directly from inside their account as well as load up the list of all their catalogs from here:
For instance, catalogs can represent content sourced by various sub-licensors you have deals with. You will most likely want to treat them individually on multiple accounts. That is what catalogs are for.
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