{
  "manageEntity": {
    "action": "Update",
    "entityId": "990308344",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaieravsuhno7d4tn7mb5r3d4h45herl3xr6mwuyw4gu5yfny6o73jlvoa\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":78544},{\"type\":\"playlist\",\"playlist_id\":114524},{\"type\":\"playlist\",\"playlist_id\":89444611}]}}}",
    "nonce": "0x9575b7c5b4966c4242a99459a1d1404079c514296322ec7d8cc4df5ca0987065",
    "signature": "0x3e9f4d468e6b8024928ec70f0a927fb44916b151c4cec8860ed1e6febbe8636518370718ca49b837e302e933dff51e6d7136f740ba2f79acb9079354d622d82c1b",
    "signer": "0xb23FFd6D016E95A4022Fbe25C4a1179AF8492788",
    "userId": "990308344"
  }
}