{
  "manageEntity": {
    "action": "Save",
    "entityId": "1688720900",
    "entityType": "Track",
    "nonce": "0x09aaa1ebc56c94c0897da28af67968ea2a7eceeda66056d2482f636ca773380f",
    "signature": "0xd4cd1559e54dc8cc01d81de326ac7a4327a38f251354f67073f4fa58be90d58445c6aec207062feb4872936933c80d90e930e702a3029bff6a4aeeef261449201c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}