curl --request POST \
  --url https://api.pictify.io/image/canvas \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "fabricJSData": {},
  "variables": {},
  "variableDefinitions": [
    {
      "name": "<string>",
      "defaultValue": "<string>",
      "description": "<string>",
      "validation": {
        "required": true,
        "minLength": 123,
        "maxLength": 123
      }
    }
  ],
  "width": 123,
  "height": 123
}
'

{
  "url": "https://cdn.pictify.io/renders/abc123.png",
  "userStorageUrl": "<string>",
  "id": "img_abc123",
  "createdAt": "2023-11-07T05:31:56Z"
}