{
  "manageEntity": {
    "action": "Update",
    "entityId": "823761689",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaieramacquyctsovmj7ubajz53vszqaxihxczqvten6gi47rfkxcaweuq\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":1549032872}]}}}",
    "nonce": "0xb9535d02711897c2d6ce5ad49a63f01751ff46e1b887eba42fead81b1328219a",
    "signature": "0x554180d56f28decc6bf9c45301afc3729560efee47f1fb251f8d1f5268d487b40dafee74cfef7e140c89d479b49226a155a9c29f843f553b127b1f0106adaef71c",
    "signer": "0x86c39aB4Ca1582d8613C1A9aE953178D87d972C1",
    "userId": "823761689"
  }
}