{
  "manageEntity": {
    "action": "Save",
    "entityId": "1120540",
    "entityType": "Track",
    "nonce": "0xe620d9d3545933f40b3633f7371a664564f9fa00a3575ef23146ddf06575e72e",
    "signature": "0x4b1582b7b4c3ec78eb94cf80a08c5c9cf9bf8d56bea35876620de7aab050f62b6904503a43b05ced19c9f240b5d789fb63c0879920011289453d140eb81329991b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}