{
  "manageEntity": {
    "action": "Save",
    "entityId": "962391253",
    "entityType": "Track",
    "nonce": "0xc719b1a6335510f64b63f015e0687df341b4f5ea5028811807a6525277761910",
    "signature": "0xe6e8cfcbdb09cb06a0ce055b5ad7a09d1e82ec5355d555a039109fff8ba313a268128a9929330ce19df64d7a08cb6b9eb009185ef293505eb1506197ef48b5ae1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}