{
  "manageEntity": {
    "action": "Save",
    "entityId": "1690895703",
    "entityType": "Track",
    "nonce": "0x019630b7b2cc386f4cd344c11d0e220a33286868c7e2851ff3932740bfad0c67",
    "signature": "0x92b1ccecbd9e7fc8c793446b8a9362be69c50d1841c7d9a11742916e1ea328ed44a52c7fc3f46ff3ca624a23143a8897d7ca5c4aeee71979e273a9fdc6ffc5fd1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}