json.m

#import <Foundation/Foundation.h>

int main(int argc, char **argv)
{
    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];

    NSString *json = @"DUMMY({parameters:{code:\"60246\", language:\"en\", country:\"en\"}, result:{\"...JSON...});";
    NSUInteger rangeStart = [json rangeOfString:@"result:"].location;
    NSString *justJson = [json substringFromIndex:rangeStart + [@"range:" length]];
    NSUInteger lastBrace = [justJson rangeOfString:@"}" options:NSBackwardsSearch].location;
    justJson = [justJson substringToIndex:lastBrace+1];
    printf("%s\n", [justJson UTF8String]);

    [pool release];
    return 0;
}