Google Merchant Center : Content API - How to add product to datafeed of input type local product

Question

I am using php, I have created datafeed using content API which is of contentType "local products".

$apiUrl = "https://www.googleapis.com/content/v2.1/[Merchant_Id]/datafeeds?access_token=".[API_token];
$request = array(
   "contentType"=>"local products",
       "fileName"=>"local_datafeedfile",
       "name"=>"Local Datafeed",
       "targets"=>array(
          array(
           "country"=>"IN",
           "language"=>"EN"
          )
       )
   );

Now I need to add products to this datafeed. I am using this api to add product

https://www.googleapis.com/content/v2.1/[Merchant_Id]/products?feedId=[Feed_id]&access_token=".[API_token];

The problem is the [Feed_id] which always show [feedId] Invalid feed id: xxxxxxxx I am using the same id for feed_id generated on adding local product datafeed from above request