{
  "manageEntity": {
    "action": "Save",
    "entityId": "413326",
    "entityType": "Track",
    "nonce": "0xb8f0f3a22499ccafbc2071e0a950b134007f85906e637e7fceba0a227ed047aa",
    "signature": "0x189b8c6fa1c5834ead6880fce0b8104f1b8358e2707a2141643c65a21f9b77dc413bda00f8a3655635a7383ead5ef8a5dd6fe5332ad63e60a618ffb2b7b3d0441b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}