{
  "manageEntity": {
    "action": "Update",
    "entityId": "456087321",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaierajopzcud4mctalbfvhelhsl2wxxwj5xzu7kcabjolx2bqcmjqjbuq\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":1053100257}]}}}",
    "nonce": "0x35220ebe2c753394d52fed161650eba54cccc517e82a212f8e05fa003a005566",
    "signature": "0x1d2b4cd83019fc6c01600be575983788703f29f04e07c1bcaf1265925e787f1948faea2a67e7a221b319c769d260e072d746a04bf2b84749c15442b9531c49b61b",
    "signer": "0x14Cf60a0eab3a24fb7230Cc44B9a9b955d28E2D3",
    "userId": "456087321"
  }
}