{
  "manageEntity": {
    "action": "Update",
    "entityId": "854449345",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera6gcb3wh3t5egtgd5jime3vx6ngxftev73y6ibzer3bofk3jvif4a\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":2105057533}]}}}",
    "nonce": "0x552f3ca59640c443b1dc5896029ec3db7521e39ba3de0a45cbb13da6797ec602",
    "signature": "0xa1ca10fee8316ed758b5d13c0fc29beaa1363ff28cec45bcd3a7a51678bb2e306538f668825f2844d590a08761ee15c63ed03dd2f8fc0685478ff69c7d2dbbfd1c",
    "signer": "0x21e530f5EA8E24d2476C3Ff8253D151693719385",
    "userId": "854449345"
  }
}