{
  "manageEntity": {
    "action": "Update",
    "entityId": "337548568",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x76f04dffa415fa9cb286481b1252bd15b850aaa1819048dd6de50ee986104126",
    "signature": "0x95c23177fe75640126a931f29fa687fda4cb9352e8e304fce85510f5c978e6f5698e8147e721a65ffbc68671ca53b07feb3bcd4119e3cdfb272965183b29e3371b",
    "signer": "0x4C239CFb7078b5F3C79094701e28f9E2A9fC70A5",
    "userId": "337548568"
  }
}