{
  "manageEntity": {
    "action": "Update",
    "entityId": "578511921",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xd9da6a33db0e486232ba893548f800093073213230aa34dd94c128b718f0b664",
    "signature": "0xcab76385d09e4fa94da70179668e82917fb6bf29244a06ab9ed544242e6c146c4e4adf3808da90e4e5606cfac29c635f977a4d2605bee250e9661785adbe459c1c",
    "signer": "0x59067832E6C6450Ccd1f2C49a71835104B5F4B1d",
    "userId": "578511921"
  }
}