{
  "manageEntity": {
    "action": "Update",
    "entityId": "409178654",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x83675c009857befe30b7a307aba5a926eb1b1a7e6f0b89f197fcf56069346688",
    "signature": "0x7dd0d739352bb1585255cc9d4ce73d9ddf367a82ae2104ce72721c941f0eca5b7eb7958fb5f1b175bcc98b7e6e2ebe3bb9cce3c291ca21d25b1444b915eb13981c",
    "signer": "0xb3168719A9181aDe0746f0F52D94015614eF5577",
    "userId": "409178654"
  }
}