{
  "manageEntity": {
    "action": "Save",
    "entityId": "1721090487",
    "entityType": "Track",
    "nonce": "0x2ffb02b61c54df6873e52d7123077c0b0416dd4c8b84b12d3037f6ba7247aac3",
    "signature": "0xa0a0f427c8258983f378c53c7fcc5a60f6c7faeff0790ce12e9042cb6b62329b594b47dcc673eaacb27333e8e57d4fd17064385271d3fec224425c0f971198c51b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}