{
  "manageEntity": {
    "action": "Save",
    "entityId": "1971532589",
    "entityType": "Track",
    "nonce": "0x7d546173cec265789aa45ad882e8317d954a8d8a18a792b00d7f340b41278111",
    "signature": "0xe6aecaed11039aedc89f4d6a7757fce11fae466b7ae7875162e25279809358e879a9217840d8ca85a19651ecd3ed8a43059fb60fc7a5d79f86788af9c33e2ce41b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}