{
  "openapi": "3.0.3",
  "info": {
    "title": "optional body",
    "version": "1.0.1"
  },
  "servers": [
    {
      "url": "https://api.123.com/api/v1"
    }
  ],
  "tags": [
    {
      "description": "Everything about API functions",
      "name": "just-api"
    }
  ],
  "paths": {
    "/silly": {
      "post": {
        "operationId": "send_optional_payload",
        "requestBody": {
          "content": {
            "application/json": {
              "schema": {
                "$ref": "#/components/schemas/Payload"
              }
            }
          }
        },
        "responses": {
          "200": {
            "content": {
              "application/text": {
                "schema": {
                  "type": "string"
                }
              }
            },
            "description": "Successful operation"
          }
        },
        "tags": [
          "just-api"
        ]
      }
    }
  },
  "components": {
    "schemas": {
      "Payload": {
        "example": {
          "token": "token"
        },
        "properties": {
          "token": {
            "description": "Some kind of token - usually received by Email",
            "type": "string"
          }
        },
        "type": "object"
      }
    }
  }
}