asp.net Mvc API

Question

I have two tables , 

1. News

2. Shop

 

And I have creating three API's

1. GetNews

2. PostNews

3. DeleteNews

 

Now, I want to insert the data by using PostNews API. But there is a problem in News Table that Shop Table contain PK(id) which is FK in News Table, so how can i insert the data in News Table, require code snippet for API....