{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x9889d99fe66ff4166f9289aa19477c917bf23832d8bf9e11f66b4dbd3ff99344",
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    "signer": "0x728BD13A62A85f3f226AeA8ce09427C384872ddE",
    "userId": "246352466"
  }
}