Modifying weight_based_shipping_price via API call by Jason

Hi,

I'd like to loop through the weigh based shipping price of my store and modify the shipping price through API call in php sdk,

I have read about "country.json" but it doesn't works for me, may be I'm calling the api with parameter of wrong format.

I get the tax value updated on the shipping country via API but not the shipping price. Please address me to do proper call. I'm doing this in private app.

thanks.