{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x81da6f5bebf2abd4a7211525b4e6a7c9c577c290c8772bf0e3b5f80f1d68a685",
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    "signer": "0x6B82c3a916F7Bd387ECc8EA9070fb09Ddea3A590",
    "userId": "899109893"
  }
}