{
  "manageEntity": {
    "action": "Save",
    "entityId": "244473",
    "entityType": "Track",
    "nonce": "0x8c6c7227eff5a92fd5d5f689b9cfa6771690378c2f972125d3cce9479c23d186",
    "signature": "0x9a6518f0dbf1a96a3c8583ae99a495be4f08d9bd78efdfabd5a4846fc3949e3b3226337f94efd4be8e9a6e1cb2d218481fdc4143b13d19570f8a063e62adb7c31b",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}