{
  "manageEntity": {
    "action": "Save",
    "entityId": "379709305",
    "entityType": "Track",
    "nonce": "0x123433d696f06a86e25428ce397b8d571cd5f88079858e10b37885223f124f96",
    "signature": "0x027707bc6f6bd609053e62dd40fa87f8163b58675078ab71188db513e8104c290f1ea84c282f815cae6b6623022a4e179edf564ca2a6447c113b42ce8f722bd51c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}