{
  "manageEntity": {
    "action": "Update",
    "entityId": "999396914",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaierahim4z3xonchs6ctg2xxoplffturmy3frsw3rhx7nwq6k6vei5bxa\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":1362308373},{\"type\":\"playlist\",\"playlist_id\":220181064},{\"type\":\"playlist\",\"playlist_id\":2053536487}]}}}",
    "nonce": "0x3374e6b6909008002fa05b10b6ffb0d6a99e914002caf6beafe379f10469e7d0",
    "signature": "0x3bfa96b668f04525342d6b28b3db2e9ede9a4c0dd27e91a8a1587878c98ad67a6036a973cf2842fe70cb7aca154b5528a8e4755ace4c0067bb90ca924969dfaa1b",
    "signer": "0x447887A35958D25Fb5B659937312606ec7E55dBb",
    "userId": "999396914"
  }
}