{
  "manageEntity": {
    "action": "Save",
    "entityId": "1777818342",
    "entityType": "Track",
    "nonce": "0x8088029dcb1fdd0731bf1676c7c890de4db57f125060c9217df223809bc6555c",
    "signature": "0xaca497747a9885d4a811685aa3a87f9a8c6e43d84b9659b65bc0318c2158c9a70b9fb150c86f6b7691a50a7c6fa7c39bb03d6f1537b03e3b9063a292a08923e91c",
    "signer": "0x28945B345Dc8334c21B4e932dA506ca6Fac7e18a",
    "userId": "290283513"
  }
}