ansible example of iterating through a dict

gistfile1.yml

---
- hosts: all
  sudo: true
  vars:
    manifest:
      1:
        librato_user: michael.gorsuch@gmail.com
        librato_token: 12345
        sites:
          1:
            url: http://www.canary.io
            name: sites.canaryio

  tasks:
    - name: "create user u.{{ item.key }}"
      user:
        name: "u.{{ item.key }}"
      with_dict: manifest