Powershell: Apply search condition on multiple json objects together

Consider JSON in this format :

{
 "Statement": " Check this content ",
 "Version": "3.2.0",
 "Parameters": [

  {
    "Name": "Parameter1",
    "Value": "10"
  },
  {
    "Name": "Parameter2",
    "Value": "5"
  }
]
}

In Powershell3, I need to check the Version value, if its "3.2.0", I want to change the Value of "Parameter2" to 32. I was thinking this way:

# Convert the json file to powershell object
$a = Get-Content -Raw $configfile.ToString() | ConvertFrom-Json
# Apply condition
if($a.version -eq '3.2.0'){
$a.parameters | % {if($_.name -eq 'parameter2'){$_.value=32}}}

Please guide on how can I achieve this.