$params = @{
Uri = "https://your.hipchat.com/v2/room/934419/notification?auth_token=???"
Method = "POST"
Body = @{
color = 'yellow'
message = "This is a test message!"
notify = $false
message_format = "text"
} | ConvertTo-Json
ContentType = 'application/json'
}
Invoke-RestMethod @params