{
  "manageEntity": {
    "action": "Update",
    "entityId": "738673571",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaieravagk6ioda7tyfwphksu5bd2pt7ozzjewvxkqkycmzso6gkrh2upq\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":1456915964}]}}}",
    "nonce": "0xa468edf54bd9d5bbda974f538d88e3fd62bf2ea9854769367d46462c675794c0",
    "signature": "0x3c517e7b95c99c15c4736d8db81b84da30981e05032d8e8f3aa225fc30d5e56c49ed3d7467a1203fbaf9f5c48c6d1d4678a6aa53eab2ec71364cb5c1c978957d1c",
    "signer": "0x9FA029c6E43fD9781215e024e9ae5802602Ed2Db",
    "userId": "738673571"
  }
}