{
  "manageEntity": {
    "action": "Save",
    "entityId": "1017801534",
    "entityType": "Track",
    "nonce": "0x71f3db745f0feb3f50483e8f9e50b8e35ebe9accd267df1b26f975b532242b66",
    "signature": "0xcbb0b6966e4fc48ff3b5ca92c2eb1be2f3c8f7a6605fdec4540084c0d1cc718a24ec6f6c492d4671a79e08c335b98722d95de0ed08ff8cd9debd977a6649fba91c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}