message": "Missing timeMin parameter.

message": "Missing timeMin parameter.

Can anybody help me please! I am trying to find free-busy times from
calendar, but I can not get the query to recognize my parameters. I sent:
{ "timeMin": "2013-08-01T10:25:00.000-07:00", "timeMax":
"2013-08-21T10:25:00.000-07:00", "items": [ { "id":
"Olga.Kuzminova.01@privatbank.ua" } ] }
And I get:
{
"error": {
"errors": [
{
"domain": "global",
"reason": "required",
"message": "Missing timeMin parameter."
}
],
"code": 400,
"message": "Missing timeMin parameter."
}
}
I use this URI:
https://content.googleapis.com/calendar/v3/freeBusy?key=My_key