{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x397c3c0fe3a24881185655e94ec23e28eada245a06c10ec4616be950e33e5ce3",
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    "signer": "0xfaB9A02FB95D7896dE4728D709e3bffA5110091E",
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  }
}