Oneliner to check that an object has specific type structure?

[hgezim]

I'm trying to ensure that theme even though it's got the type of Prisma.JsonValue, the actual shape of it is like CreateStoreThemeOptions:

export type JsonObject = {[Key in string]?: JsonValue}
export interface JsonArray extends Array<JsonValue> {}
export type JsonValue = string | number | boolean | JsonObject | JsonArray | null
export interface CreateStoreThemeOptions extends Prisma.JsonObject {
  primaryColor?: string;
  mainBackgroundColor?: string;
  footerBackgroundColor?: string;
  headingFontFamily?: FontFamily;
  deactivateAuthor?: boolean;
  deactivateRatings?: boolean;
  hero?: CreateStoreHeroSettingsOptions;
}

private isTheme(theme: Prisma.JsonValue): theme is CreateStoreThemeOptions {
    const castSettings = theme as CreateStoreThemeOptions;
    return (
      typeof castSettings.deactivateAuthor === 'boolean' &&
      typeof castSettings.deactivateRatings === 'boolean' &&
      (typeof castSettings.footerBackgroundColor === 'string' ||
        typeof castSettings.footerBackgroundColor === 'undefined') &&
      ((typeof castSettings.headingFontFamily === 'object' &&
        typeof castSettings.headingFontFamily.name === 'string' &&
        typeof castSettings.headingFontFamily.url === 'string') ||
        typeof castSettings.headingFontFamily === 'undefined') &&
      typeof castSettings.hero === 'object' &&
      (castSettings.hero.image instanceof File || typeof castSettings.hero.image === 'undefined') &&
      (typeof castSettings.hero.text === 'string' || typeof castSettings.hero.text === undefined) &&
      (castSettings.hero.type === 'latest-recipe' || castSettings.hero.type === 'custom-banner') &&
      (typeof castSettings.mainBackgroundColor === undefined ||
        typeof castSettings.mainBackgroundColor === 'string') &&
      (typeof castSettings.primaryColor === undefined ||
        typeof castSettings.primaryColor === 'string')
    );
  }

I'm sure there's a one-liner for this somewhere, right?

The broader goal here is to merge an object of type CreateStoreThemeOptions with the ones that comes from the database and is of type Primsa.JsonValue (using ramda's mergeDeepRight).