{
  "manageEntity": {
    "action": "Save",
    "entityId": "250011",
    "entityType": "Track",
    "nonce": "0xe33f177355dee2a477494d7245e907a8885f3a7ae6f3678cf924b3b6f1827cba",
    "signature": "0x9f59b8eaa3299a9ceb0bea696f048de8665daa16a504394b3d549ffe2e0d0c1f44d32b6d4e1a50ac57c0ec2741ee2f37e49d9933cd073b361b2eceb3d2353abd1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}