{
  "manageEntity": {
    "action": "Save",
    "entityId": "619192060",
    "entityType": "Track",
    "nonce": "0x93a79b5335b4c5c86bcb17dd49436a386499f02f9626e00f508a0be57716d9ff",
    "signature": "0x0e409c16b9a17b28e117c031b4f8100cabe0aaeb065531ab413d2b7aa4ceca104519c4c9ee9ceb00a21fa352d15d5a14dfea3a939b610b0c43dada922cd38cda1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}