{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb011486e18f6c3cae27eba644af15560cc945bb8837134d53db10f258550602c",
    "signature": "0xe88c6947c7015e140b5a4361689660ad7953e2f97687b4cb35f532f0a9912fce02a8466a4a8d21cb30bb7824acfc8488b69bf6f0a6cdd01ebbfeb197d998a8631b",
    "signer": "0x5EF3c864B81cEcf00dA78aaFD423E76cf877A012",
    "userId": "421807263"
  }
}