{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x8088c8584867ffb7e072b1e1803ee7d6f7c21c6921d0784439add48270a692fb",
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    "signer": "0x546690a449F7c233e1d182fAEa6cAd5d6f5C4223",
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  }
}