{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x4a3cc3867e689fb5584cfbbbdaa95effaddf04d73f208472687dca8391167148",
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    "signer": "0x73EC7Ff9D0A38b4ec5ea3d4Bd2BB426A6B4CF512",
    "userId": "612810516"
  }
}