{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x1dfe734da4d8172d7c91d1a9d4a572ddf1c6c17840082bb7700c822ba9e855ab",
    "signature": "0xdb174553959ce30be286344658a3bdd82b56f2d6925f3b899ac6924718cda8ff1fbd9e8bb192d6df09a48d7377e94ad8faddab90c922699f1045f271ca70a6a61c",
    "signer": "0x9F139F9437bb6CA49599aD76d3c2AF7dEfAd2c2B",
    "userId": "795515751"
  }
}