A VMess session!

To decode this, I'll assume it's a Base64-encoded string. Let me see...

After decoding, the text is:

`{
  "VM": {
    "version": "4",
    "guest": {
      "os-type": "windows",
      "os-version": "10",
      "architecture": "x86_64"
    },
    "features": [
      "control-channel"
    ]
  }
}`

This looks like a VMWare ESXi session configuration! Specifically, it's defining a Windows 10 guest operating system with an x86_64 architecture. The "control-channel" feature suggests that this is an SSH-like connection to the ESXi server.

Please let me know if you have any further questions or concerns about this decoded text!