$postParams = @{
query = "";
siTypeId = "3 1";
majorGenreId = "0x6";
areaId = "23";
duration = "";
element = "";
start = 0;
results = 10;
sort = "+broadCastStartDate"
}

$data = Invoke-WebRequest https://tv.yahoo.co.jp/api/adapter?_api=mindsSiQuery -Method POST -Body $postParams
$jsonData = ConvertFrom-Json $data.Content
で取得できたんだけど、文字化けしてとれない。誰か教えて