{
  "manageEntity": {
    "action": "Save",
    "entityId": "323877822",
    "entityType": "Track",
    "nonce": "0x640a5558c7df887af7a504c652e477af559f76a3f131fde6b8392aa0d5320f0e",
    "signature": "0xd1032ccbdbd3b596abc7c44de14e0ff451a3e6baa20941dc7a1366d8a79aeb9b29ed4f24d1b77f583b3c84a7cffa6ec9c3aa0ce56c4fa8042539a5a14301d6331c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}