{
  "manageEntity": {
    "action": "Save",
    "entityId": "2068758856",
    "entityType": "Track",
    "nonce": "0xce15fea1dd3796f5eab4939863d89456f9976751b5b1b6aece0e32cdecee6841",
    "signature": "0xe9eabbc8c64b03df0e03603f21d4b366d4fba7ea5633595e1f63fbb77dec5f916738cc0eb696b286346b85cb627bc203c0ec1b66b3bed0974c35a9f41a18e7bc1c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}