{
  "manageEntity": {
    "action": "Save",
    "entityId": "2133750852",
    "entityType": "Track",
    "nonce": "0xddb3e79c4490b715d1627576f9418602edb3be3b34eea970f9e3ed7fe0662c36",
    "signature": "0xa8dca2383c989396a012cc92cbdf37cef5d00618dd9fa9329d53c4a06df297db5c1c1fcae7e5c7c00fef4a95145a5a3287c826a94eadcdca82d32e905962e4441b",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}