I cant get swagger to send a POST request as plain text. I am new to this, can someone help me out!

/**
 * @swagger
 * /:
 *  post:
 *    summary: Use to validate your text for bla bla format
 *    description: Request is sent through body as text/html
 *    requestBody:
 *      required: true
 *      content:
 *        text/plain:
 *          schema:
 *            type: string
 *    responses:
 *      200:
 *        description: Validated
 */