{
  "manageEntity": {
    "action": "Update",
    "entityId": "599428901",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera4xw7xsgtbh4k5v5ecehk5gkkprknyj4oy4v2exa5vbwceqxtvcrq\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":197709728},{\"type\":\"playlist\",\"playlist_id\":230825982}]}}}",
    "nonce": "0xe688388ff00940b6598cebb451376e0e7ff77153bd9169cf4ddc3fd705171f2e",
    "signature": "0x777f3824ff5240be947bc9bf39bbaba01bbc5ca9e02eb42dc55e488ba1d4527b54ab047cf3e49e1c04c764834ae441647634e661b73a212a633905443248da071b",
    "signer": "0x2e16aEAD8DD93b4dB416EC8F6737547E2D945574",
    "userId": "599428901"
  }
}