{
  "manageEntity": {
    "action": "Update",
    "entityId": "838845372",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaieraiqnsfzckflhyjpsy77wexsanb6ugsc5rjqztfdzla66bxrw7dztq\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":305158404},{\"type\":\"playlist\",\"playlist_id\":1354732659},{\"type\":\"playlist\",\"playlist_id\":957280129}]}}}",
    "nonce": "0x46c5e4cb8485620515eff4862cc45309651314794fa032e52a8c8626d28a7429",
    "signature": "0x544a49d24231208ff86a6bafe285532e38451468e4e06e01219d34e7409836ff5e8e7b44fa140e6bb0d636ae2285b850efde47f970f8cf4f818a6ffcbcb4c9b91b",
    "signer": "0xd3D7e58C92d4bbB0dAE40C464B950A56DF802BDF",
    "userId": "838845372"
  }
}