{
  "manageEntity": {
    "action": "Save",
    "entityId": "1891585440",
    "entityType": "Track",
    "nonce": "0x8509f551c54871f0f0cd08b6b7c3a613d18240fcd04237d9601c6119c525ef09",
    "signature": "0x5e25d1733eed647342d9117acae4b6ac51d66a0550de6dc56a5b59afa7445fed2d335e4b28355902e052702ca103a2b214aade8ec0fbf4d5441e4a24d3665c411b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}