{
  "manageEntity": {
    "action": "Save",
    "entityId": "1455025458",
    "entityType": "Track",
    "nonce": "0xe576f9c51b5558f0447c78f903b11d736c3ded02cd822909c7da75cba4e8b583",
    "signature": "0xecedb083e60f79d63cdf1e9db3b4cdc6c35759311199463356bcf2ad038c7a42701b8120ff283087db222785b3dd144408ce27d495995b7ea7a079397be4232c1c",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}