{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd022235eace505870079a00bc33b63e84cade26042016ca440f7c25e2e9e6b61",
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    "signer": "0x66e1C9Aa2977Ff517D35f2AD8983b3EeA78e6132",
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  }
}