Alert type – voice message
Send a voice message. Specify the sender, recipients, voice format and content.
{ "version": "latest", "apiKey": "abcdefghijklmnopqrstuvwxyz", "clientRef": "abcd-efgh", "alert": [ { "alertType": "call", "sender": "+447777100100", "recipients": [ "+447777100100", "+447777100101", "+447777100102" ], "tag": "t1", "voiceFormat": "mp3", "contentEncoding": "base64", "content": "UklGRgi3AA................==" } ] }