{
  "manageEntity": {
    "action": "Update",
    "entityId": "499867732",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x47cd8c49505fbc6ebfdef30ecc437d102ea73a3c34338f5b0b9c119ca5d93b2d",
    "signature": "0xc04c00c0bcb6f560532fd7c5f88770bfc109f4a015615e0a8ac2961b95ef1b411f6f4f7edf84f2aef7ecc0539ec376b5e1a97fda5a338f6c9cb510143c7d8cd81b",
    "signer": "0x5E9e335B926f13fCfB757dd03233B4f682DDb6d8",
    "userId": "499867732"
  }
}