{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x9fcef4fd5c6afd99b96083d47800cc802109728f6832b4583b124dce8d2cac4b",
    "signature": "0x3b1584794032e228c54e9e14dd0324b6ce0b5c76896d4eb4f4031057266485087fe7f77899ad8c39d5aa7947dd0da7a1dbfbadc43b719f3269452859cff1cf921c",
    "signer": "0x9dF227B55c2eD3c2A15f8e339BFA56dCa2FF2cE3",
    "userId": "249947071"
  }
}