{
  "manageEntity": {
    "action": "Update",
    "entityId": "603916020",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x1e73b687ee3b34f8dd175b8db8ac4fad3924685432f4553cff24cdcd1534d7fc",
    "signature": "0x0a1a482b02c2aa94e52ab43adec4ec3fc8d0b3f61b59412c33878ad40b4052867f84cd7cec04572e8979a224f6dfda61250e34a4755a128a33c7f445a548fa6d1b",
    "signer": "0xE35DcC5C816D790A9f730B4696F43Caf64d5d1e6",
    "userId": "603916020"
  }
}