Remove " " from key string in a NSMutableDictionary - ios

Question

Here's my dictionary:
Birthdate = "01-01-0001";
CareerField = 3;
Gender = 2;
"Interests[0].UserProfileId" = 19594;
"Interests[0].UserSurveyId" = 1;
SocialStatus = 2;
Studies = 3;
But I want the Interests key to be without "".Like that:
Birthdate = "01-01-0001";
CareerField = 3;
Gender = 2;
Interests[0].UserProfileId = 19594;
Interests[0].UserSurveyId = 1;
SocialStatus = 2;
Studies = 3;
UPDATE:
Interests i must send them like array.
[dict setObject:self.birthdayDate forKey:#"Birthdate"]
[dict setObject:#(self.occupationPickerRow + 1) forKey:#"CareerField"];
for (int i = 0; i < [interestsArray count]; i++) {
NSString *stringSurveyId = [NSString stringWithFormat:#"%#%d%#", #"Interests[", indexCount, #"].UserSurveyId"];
NSString *stringUserProfileId = [NSString stringWithFormat:#"%#%d%#", #"Interests[", indexCount, #"].UserProfileId"];
[dict setObject:[interestsArray objectAtIndex:i] forKey:stringSurveyId];
[dict setObject:#([[[MZEngine sharedInstance] currentUserModel] userId]) forKey:stringUserProfileId];
indexCount++;
}