{
  "manageEntity": {
    "action": "Update",
    "entityId": "350781081",
    "entityType": "Playlist",
    "metadata": "{\"cid\":\"\",\"data\":{\"playlist_contents\":[{\"timestamp\":1787922885,\"track_id\":42082},{\"timestamp\":1787922885,\"track_id\":219363}]}}",
    "nonce": "1787922885170543844",
    "signature": "0x9c0a2ea2da9cfe5ed75976e0a2657f0e8218f705f5f5f22b06fd0f47f653f7c045ad8bfb28cd70115a3c12cc22ef7e297c5a8ebcabdd0a874a3b6e9eeea002191c",
    "signer": "0x922cb2AE695da9f7Dd0e556954c23eeeb8bfFe0E",
    "userId": "24335262"
  }
}