{
  "manageEntity": {
    "action": "Save",
    "entityId": "193250326",
    "entityType": "Track",
    "nonce": "0xe28da1f3927b1319f29e094fff29550d5de9212a12854b34ce73cb19fe6e338c",
    "signature": "0x1a904dd15748aa0e16b7cc461d397c203e39ce5d617021374db764a57ff87a637140d983d0d23c28a5f729a40e834ac6f5ff6831b59e8053ea7fe824409e372e1c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}