{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x912654d4e117e5b7c99b14eadb1fbe2613271c1888cd97a9a2637d71da9c3e33",
    "signature": "0x86a9efd293faca92b675b04c0ddd34523b5c3156260355b2a1dd182eb8feeaee58933e48cf66720cabda16aa6d67b33bb9ce7e768d37bff58d7a3d24a09eae011b",
    "signer": "0x2a14233e1f50922EA23fb817931968707B6A04c0",
    "userId": "727256442"
  }
}