{
  "manageEntity": {
    "action": "Save",
    "entityId": "966384890",
    "entityType": "Track",
    "nonce": "0x986de21dc046c15a35cff98abc1ec7705aad552abcf8098708c6d143e335d2f4",
    "signature": "0xf1b6ad4a340266abb8dd0f35dc0720c961ddb082ee7b3ef4a2b8cc85ec5765940384a0730a94069b5dafe1165923496d11289f0516c2752c42570e6c4e6d10f61b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}