{
  "manageEntity": {
    "action": "Update",
    "entityId": "657998758",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaierapmqapgrehubldr2bvscbhfrjd7hlumys32gtuct6nvh3okfzotdq\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":1833939046},{\"type\":\"playlist\",\"playlist_id\":738247231}]}}}",
    "nonce": "0x2744d8e5dcc5bd099f72cc6f39fb1f190dde8fdeddfe636ddbb52a4ad8ba25b0",
    "signature": "0x9aec872f67967a04e31fcb27ccb509e8f6dc866a526956ffae01eda4661e821528ffff4d3cf8946d4b4b5fc2f9cddf6574e2c1c67fff66ba7fb94aa45e37801d1b",
    "signer": "0x5458BE2DC305e17948f3b87eBA8f2B7085E57eed",
    "userId": "657998758"
  }
}