{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x0c4ea330000ab2fec718a0b88156419e4c2c8e0f404327ecb5173a1dbfbccda4",
    "signature": "0x41b4c247e7c83549c66245e709278b8c89ad157c89e0c798ea72595c5fa8427e2affa8e867ac7f9737e930adb335e1af2646337c59187f78c84ad0592e822f1f1c",
    "signer": "0x2617Baa16D31c86F036F8bF0CA9dF6ca2Bb2f88B",
    "userId": "485391007"
  }
}