Json request need to send as a list to HTTP body

Hi, my data is as shown in the screenshot.
I need to send this vin numbers to HTTP body in json format as list .
to converting my data into json format , i am sending data to json conveter in 2 ways . As table 2. As an Array

  1. sending as a table to jsonconvert.serialize -Json format is as shown below
  2. sending as a array to jsonconvert.serialize - Json format is as shoen below

but i need to send in the below format along with Header but header should be only once.