{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x6627b5e4596c228c1d487a694bbdd20e75ec03e27a8d353fb8a4ff611787d073",
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    "signer": "0xAd6164Ba35C7e17dCC1Ac6bF049DE92B4F318AC1",
    "userId": "486746705"
  }
}