{
  "manageEntity": {
    "action": "Save",
    "entityId": "947750",
    "entityType": "Track",
    "nonce": "0x673259d8067eb187b5c5b5dba12b667b2fd193340962670e128048421ba53bb3",
    "signature": "0x998278780ae3384de953b9b7eb81f374364384f3bad6b7292ee76c62cab61b506a3292fd493836777394593dcc2a0e7b98d734c1b56340a0d0bef9394dbe34d11c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}