curl --request GET \
  --url https://restapi.sign.plus/v2/envelope/{envelope_id}/annotations/{document_id} \
  --header 'Authorization: Bearer <token>'

{
  "annotations": [
    {
      "id": "<string>",
      "recipient_id": "<string>",
      "document_id": "<string>",
      "page": 123,
      "x": 123,
      "y": 123,
      "width": 123,
      "height": 123,
      "required": true,
      "signature": {
        "id": "<string>"
      },
      "initials": {
        "id": "<string>"
      },
      "text": {
        "size": 123,
        "color": 123,
        "value": "<string>",
        "tooltip": "<string>",
        "dynamic_field_name": "<string>",
        "font": {
          "italic": true,
          "bold": true
        }
      },
      "datetime": {
        "size": 123,
        "font": {
          "italic": true,
          "bold": true
        },
        "color": "<string>",
        "auto_fill": true,
        "timezone": "<string>",
        "timestamp": 123
      },
      "checkbox": {
        "checked": true
      }
    }
  ]
}