Creates a new theme
Params
- theme.title, required, string. Human-ready title of a theme.
- theme.version, required, string. Version of a theme.
- theme.description, optional, string. Text description of a theme.
- binary, required, base64 string. A binary zip file (or any other) encoded to a base64 string.

{
    "accessToken": null,
    "theme": {
        "title": null,
        "version": null,
        "description": null
    },
    "binary": null
}