{
  "manageEntity": {
    "action": "Update",
    "entityId": "766266881",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaieradxuwpx4wxdzoghiv6kazmnbbs3egp2ou4wjrazpih5geuhumgn2q\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":1984908651}]}}}",
    "nonce": "0x1c5dfb3b507358d9effdaba09cd95061ff4a304fe1ab002caf523f29a6d742e3",
    "signature": "0xe407a85cb67fd51c3d203d21bac0be86c0707989bffc41162584f367f79bf2c05d84f2f5eb85660749cdc7b1deec6b22f30a3780e48cd302c06c857c3418e4141c",
    "signer": "0xB90003df339139E8859c42e5B01FeeD18Bbd7CB2",
    "userId": "766266881"
  }
}