{
  "manageEntity": {
    "action": "Save",
    "entityId": "1230704907",
    "entityType": "Track",
    "nonce": "0x5ef97bfff5721aa04c1d834201425d31604ca28b2c49e70399d0061fd356adbe",
    "signature": "0xdb3715d43289e6e75a6958cf1201869077bf454be7004478828d694700716af778e97b7d7d30cfa8af2c1a1fc24c88e383c9b41923ff4a38601d53b4f7c9cfba1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}