{
  "manageEntity": {
    "action": "Update",
    "entityId": "486383100",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x8bc417aa907582b467932d638b6041d20291a8c49e20687b98210c569dcabe1b",
    "signature": "0x4c9c3159ae09693833cb21bd6fc615e58549f58e4c0bfe905bfbb8ff47575cee7b7f3500c1b4dd01797613adfb0e344e4f7ff0fa02cb98d715a3915f0768c6021b",
    "signer": "0x54ac7C3663316Ac940EA1Cfd1FAB49024eE24156",
    "userId": "486383100"
  }
}