How to define flat object structure in swagger body parameter - swagger

Question

I'm using swagger 2.0 and need to define a post request to create an account object. The object data is passed in the body as a flat object structure:
Example body data:
{
first_name: "Sherlock",
last_name: "Holmes",
address: "Bakerstreet 221b",
# tax_id: not set, # optional
}
When I create the request doc in yaml:
definitions:
new_account:
properties:
first_name:
type: string
last_name:
type: string
address:
type: string
tax_id:
type: string
required:
- first_name
- last_name
- address
paths:
/accounts:
post:
summary: Create account
parameters:
- name: account
in: body
schema:
$ref: "#/definitions/new_account"
the documentation describes a body with exactly one element: account which itself contains some fields. However my structure is flat, no top node account.
If I leave out the name attribute, it's basically the same, only that the name column is empty in the resulting documentation and the whole structure is either required or not.
My current workaround is to list all parameters and set in: query but that's obviously wrong.
How to define this?

Answer 1

account is just the name of the body parameter. One usage is in the method signature in the API client generated by Swagger Codegen. In other words, account is not a top node (FYI, in Swagger spec 1.2, the body parameter must be named body)
Your definition above is correct for the example body data you provided.