{
  "manageEntity": {
    "action": "Update",
    "entityId": "243887839",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaieraste7m643uq7jcvx4e5ha6gc5qae7xtq3ai6ahsuq765lt54hz63q\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":1351803427},{\"type\":\"playlist\",\"playlist_id\":1582573507},{\"type\":\"playlist\",\"playlist_id\":1068121409},{\"type\":\"playlist\",\"playlist_id\":821830912},{\"type\":\"playlist\",\"playlist_id\":619404556}]}}}",
    "nonce": "0x76caf3e1639efb3e3fffaa56a2f5c52ca5169fffd297d72d171591c2c55e7d53",
    "signature": "0xb1a6f0173cf6b48b0b6b2da9e184f03b13021439f3743a7497858bce5c01bd262b64906519719aaf95ec187082481b4d33ae9f1b45874188f3fcf8fc558208291c",
    "signer": "0xFfbC9CB253a54E8c512BbB1640A30096b96c0623",
    "userId": "243887839"
  }
}