{
  "manageEntity": {
    "action": "Save",
    "entityId": "57323839",
    "entityType": "Track",
    "nonce": "0xf14eadacdf94e2f93f967f1c3d5944fb9397371191b27e3b406d3c8a0b316e46",
    "signature": "0xc1707f045d720ccf60855376cb9d76c3d3fc3b1d5d0d45d885aa936228f5c1bf77e8d2361282af0bbccbaf8704de832084201742e9a82d665c74f0dabef16be91b",
    "signer": "0x48a006fC89FEf065AAB7A5769519625870833CC6",
    "userId": "128172"
  }
}