{
  "manageEntity": {
    "action": "Save",
    "entityId": "1174369398",
    "entityType": "Track",
    "nonce": "0xe1cac87e15bc3712cc826944f5c20da718f160c7f983025f97b86f883ea216e4",
    "signature": "0x54bd04a4ff16e94bd01a90b277f8ce74d0f50692a89585939dcb6ae5c1c63fc874ec31ba6d6f93a82ba055514541c475b2e26836f011850823fd5aba260558c81b",
    "signer": "0x767f09338Ac6CE8645c0a76a17a560429b582132",
    "userId": "520958130"
  }
}