{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x216cf4703831ed613f3db4e88c86b3bace94164f83fd0f5a4f4db01fc641f7e4",
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    "signer": "0x1d9F7D75b7dB31c5d4D499acB963BD3B1321B100",
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}