model.save and json object

Hi, i have start using your plugin and i have some questions

when i do model.save(), i see that no parameters are send in the request.
so i have saved the model this:
this.model.save({param:this.model.toJSON()})

my question is there any other technique which i can use to send the parameters as an
json object?

EDIT:

Hello,
hope you can help.

I'm using your backbone.rpc plugin and probably i'm doing something wrong.
each time i save the model i get duplication in my backbone model.
i have the regular model properties as well as the param object that contains the model properties.

I'm using this like so:

method deceleration in model:
create: ['saveCampaign', 'params'],

save method:
this.model.save({params:that.model.toJSON()});

what exactly i'm doing wrong?, how can i save the backbone.model, without seting each property like you have on your git example.
hope you can help

Thanks