{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xca80f1f42eacb8b442297ddf54777a310495b12540c9809327953257a05e4326",
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    "signer": "0x71d0bffb1011D6Adc66839Dd71b9e177a5B5dc63",
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  }
}