{
  "manageEntity": {
    "action": "Save",
    "entityId": "1885468022",
    "entityType": "Track",
    "nonce": "0x5de64b0fa55f5488e99dbd0df343f272d068a3b771ff0414a5d9b631c39ac484",
    "signature": "0xc7bcae6854fb3e2ffa7ea695f6e4e7d1e661ea67aedcbbd916d868b77fdf53b21da055c478d4007df9f3f0eed158a40aa33ee38799363fc3542581f9293ed25d1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}