{
  "manageEntity": {
    "action": "Update",
    "entityId": "387908512",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x47fb90d453ffa6ba40b855114787b0666875083b2be521eefa43256826deb398",
    "signature": "0x23fb236acd3c9e35b67095e683943f2746e66c9ba6ee8b1434d3b5d9f245866f2dd94d5d8722bc29318c1fdf25825718c4b575bf34a284b20fdce25a0821318d1b",
    "signer": "0xEA204F8a0fcB8a990f24A4E79156a5Ce1dD9afe5",
    "userId": "387908512"
  }
}