{
  "manageEntity": {
    "action": "Save",
    "entityId": "409960",
    "entityType": "Track",
    "nonce": "0x5e92213646608fca928605f713b07b704aba50fbd5714fd4f987013427728b7b",
    "signature": "0x1f330175ffefba08856aafb64359479a535ca44866b24cdb696d5eab45f22b24151a7301d4848a5b30e89ed795711d90e55f4b5c6a5f83d7e8f3121219325f171b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}