An idea for sending tabular data with less overhead both on amount of stuff to send and on amount of stuff to convert.

tabular-JSON.md

Tabular JSON

A transfer format that is a valid json but looks a lot like CSV and does not have overhead of sending repetitive parameter names.

{
  header: ["id", "username", "first_name", "last_name" ],
  data: [
    [1, "jsmith", "John", "Smith"],
    [2, "jdoe", "John", "Doe"],
    [3, "james.s", "James", "Smith"],
    [4, "janes", "Jane", "Smith"]
  ]
}