In previous scripts we worked a lot with hash tables, and even loaded them from .psd1 files. If you need the data in a different format, for example JSON, conversion is trivial. All you need to do is convert a hash table to an object first:
$hash = @{ Name = 'Tobias' ID = 12 Path = 'c:\windows' } $object = [PSCustomObject]$hash $object | ConvertTo-Json
Once the hash table is an object, you can simply pipe it to ConvertTo-Json, or any of the other ConvertTo-* cmdlets.