{
  "manageEntity": {
    "action": "Save",
    "entityId": "1573383441",
    "entityType": "Track",
    "nonce": "0xeba8caaa882904c9a5b39d64526735c09dfad161b8c8973c2699cb35ceb96729",
    "signature": "0x4d402b5560d41a18c9ebd06a67535d46e5ffc8c694fdf0953e46791b9e151bf931684adcb6c21db478b465070e0a06b39a113be22da5bc192550dc45918009f81b",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}