{
  "manageEntity": {
    "action": "Update",
    "entityId": "639294403",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x2d50d03f7317064cc15345999f3239fe1761dc1bb5daf0c41dad05869fad0da0",
    "signature": "0xe78cae314a7ce335ae6a4fb4827418e4839533aef3e04ca0d148b6e1e35e393b491aa906aca17719db01314a15844637246da0b82d57f1b3e619e158186c13191c",
    "signer": "0xc19ead32dc9dCDD7aeB5997D89B62105A076e806",
    "userId": "639294403"
  }
}