{
  "manageEntity": {
    "action": "Save",
    "entityId": "1474835508",
    "entityType": "Track",
    "nonce": "0xd32c50e61f63fc0f26e6c225d121d1dfe3f085f54fac411bb0a3b96af643ecca",
    "signature": "0x4f0e4dcd87700d5885c490e10eb359836618fbf8e068b975b5d0656e340b9b822d20811b035d35a37fc469345558c75c128522cbff8c63d42a7762d7556ba0441b",
    "signer": "0x6AAB6EaEa3f7F15750b649C269b0391dcB19dEeb",
    "userId": "92019297"
  }
}