Example should be more concrete

[Nat Sakimura]

Currently, response eamples look like

HTTP/1.1 200 OK
Content-Type: application/json; charset=utf-8
{
  "Accounts" : { }
}

Accounts should be expanded.

[Edmund Jay]

fixes #1 : Example should be more concrete

→ <<cset 43bd2a0388f2>>