{
  "manageEntity": {
    "action": "Save",
    "entityId": "1595566328",
    "entityType": "Track",
    "nonce": "0x1cf16b3928901636b520b350ba39a1edfca56943b1d43da9bcb673d4a644e331",
    "signature": "0x47057a54128c521a81934260d41b7eb39dd729410fd93c0c0364a57a91073d700669ff6a6e0a661668600cfcc1e0e8dd1fb029e961bab5e8e97b92b96a7c2aae1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}