{
  "manageEntity": {
    "action": "Update",
    "entityId": "453799318",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x943c41d93fbd347c2d741be9305c4e5901883bcb79906a21f71f648bd80d3c82",
    "signature": "0x16d22623cb2306b6086978a1d47d5fcfdac9ca561d8084cbe7e37f1d815598ab0fabf7c9c44762d4fc4813289a8e21af648272af97c60f5bf0fcc1afbe9795e21b",
    "signer": "0x641F0ca56b08cF1eB27b9f07FD6D26E53b718b3e",
    "userId": "453799318"
  }
}