{
  "manageEntity": {
    "action": "Save",
    "entityId": "752979",
    "entityType": "Track",
    "nonce": "0xe33d043b08481ba3b9bc58082e46e4505a1d83d6e9269c2addcf9530a62ff000",
    "signature": "0x142925a0eacac09ebe315faafbf4d2bc3eb50d276238f8529de43460e659f4056b83ba36aa216bf56acda8f07ece71d0f34e6ca0ca5ed659e519ba7909b3fe901c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}