{
  "manageEntity": {
    "action": "Update",
    "entityId": "500386524",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x2867f42985bc0eff6681cad9b64d97aa36e05a213b453bfebc3ae9fe08d9fb50",
    "signature": "0x62c37cfc2d4649cb530a35beab41eb2de8d43022fd490d351d547c0b30a8c57c6bf013dda576c8f54df50e6f2116c317d5bfe2da0a6e83d13a66bf76820c336d1b",
    "signer": "0x9e1FBf5911997bE49e57ed3C65D060D20f3841BA",
    "userId": "500386524"
  }
}