{
  "manageEntity": {
    "action": "Save",
    "entityId": "103821",
    "entityType": "Track",
    "nonce": "0x26feab09dcdbe1ec65430886aa9e5e7804f074bfe80b91e6f08319c964c9e3b5",
    "signature": "0x328dacc88f941c9565cf94258314fd204071dc811b2493a471896736baa4c8182c743101df14ca29b1ee5777eedd2763478ca660e8e5b9d4a0fb395a26e0a50a1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}