{
  "manageEntity": {
    "action": "Save",
    "entityId": "723248793",
    "entityType": "Track",
    "nonce": "0x05472d079ee5301d39ec9b9fe21771319b4085fe9e279753a82fdbbaf96d3a2c",
    "signature": "0x102294b391948bc7e3b63d0ee9e992ce9dcc00d186a6070841f51f7ad3c6489a5fa985905e609dd0d6144d38d69d6f3ae268039f01b9971ac942f56dcaa671ee1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}