Howto store and update environment setting in JSON to track changes.

EnvironmentSettingJson.ps1

$token = '<API_TOKEN>'
$sourceEnvironmentName = '<SOURCE_ENVIRONMENT_NAME>'

$headers = @{
  "Authorization" = "Bearer $token"
  "Content-type" = "application/json"
}

# get source environment ID
$sourceEnvironmentId = ((Invoke-RestMethod -Uri "https://ci.appveyor.com/api/environments" -Headers $headers -Method Get) | where {$_.name -eq $sourceEnvironmentName}).deploymentEnvironmentId

# get source environment properies
$source = Invoke-RestMethod -Uri "https://ci.appveyor.com/api/environments/$sourceEnvironmentId/settings" -Headers $headers -Method Get

# save to JSON
$source | ConvertTo-Json -Depth 10  | Set-Content .\$sourceEnvironmentName.json

# store $sourceEnvironmentName.json in repo
# edit $sourceEnvironmentName.json if needed

# update environment from file
$source = $source = Get-Content .\$sourceEnvironmentName.json | ConvertFrom-Json
Invoke-RestMethod -Uri 'https://ci.appveyor.com/api/environments' -Headers $headers  -Body ($source.environment | ConvertTo-Json -Depth 10) -Method Put