string method: Should be the same as the method specified by the server.
string api_key: The application key associated with the calling application.
string access_token: The access_token obtained in the above step.
float call_id: The request's sequence number.
string v: This must be set to 1.0 to use this version of the API.
string format: Optional - Ignored.
string cnonce: Optional - Client-selected nonce. Ignored.
string nonce: Should be the same as the nonce specified by the server.