curl --request GET \
  --url https://api.hubapi.com/content/api/v2/pages/{page_id}/versions

[
  {
    "object": {
      "id": 352531415,
      "name": "Contact Us",
      "slug": "my-api-demo-page-slug",
      "html_title": "The API Test Page",
      "created": 1381896129000,
      "updated": 1441239877000,
      "publish_date": 1424373283000,
      "has_user_changes": true,
      "is_draft": false,
      "portal_id": 62515,
      "subcategory": "site_page",
      "template_path": "generated_layouts/352531305.html"
    },
    "user": {
      "username": "key-api-216.253.207.138",
      "id": "",
      "full_name": "<firstName> <lastName>",
      "email": "key-api-216.253.207.138"
    },
    "version_id": -1,
    "authored_at": 0
  },
  {
    "object": {
      "id": 352531415,
      "name": "Contact Us",
      "slug": "my-api-demo-page-slug",
      "html_title": "The API Test Page",
      "created": 1381896129000,
      "updated": 1441133948000,
      "publish_date": 1424373283000,
      "has_user_changes": true,
      "is_draft": false,
      "portal_id": 62515,
      "subcategory": "site_page",
      "template_path": "generated_layouts/352531305.html"
    },
    "user": {
      "username": "key-api-216.253.207.138",
      "id": "",
      "full_name": "<firstName> <lastName>",
      "email": "key-api-216.253.207.138"
    },
    "version_id": 3280956201,
    "authored_at": 1441133924025
  }
]