{
  "manageEntity": {
    "action": "Update",
    "entityId": "64534769",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xaec934042acd03b820cf4af4d122d9e28f485fa851795fad89a2d8f1787e2184",
    "signature": "0xef83983a8a30330665169e428f01fe6f43c20a92a4456a906b4800e6af6f5386224454d3471f74689925e1683b897bfb47473c70f846a57fee70c80e00a0f9d71b",
    "signer": "0x2881CC161622bC647b88915D64A5354a85Bdd555",
    "userId": "64534769"
  }
}