JSON request

Content

We have a BO created in VBCS. we automatically got the Get, Get Many, POST etc  REST end points.

1> in VBCS, we select Get ( Many ) endpoint and click Test tab. We click Send. we see Status is Ok.
we get 2 records nicely wrapped inside as below.
{
    "items": [
        {
............
............
..........

        }
    ]
} 

2> Now we want to execute POST So we select endpoint POST Create  ( Create or Upsert )

we copied above payload we got in Get Many and pasted it in the POST Request window this time to create 2 records in BO ( we changed the JSON attribute values to make these 2 records distinct).

When we click Send we keep getting following error.