Exporting Swagger/OpenAPI to Postman collection with examples - swagger

Question

I have a large codebase in NestJS for which I have used Swagger to document the API routes ("#nestjs/swagger": "^3.1.0"). However, the Swagger UI seems to be underpowered for such large projects and I would like to migrate to Postman. Here is what happens:
Take for example this model structure:
export class IApiGenericRequest {
#ApiModelProperty({
example: null,
default: 0
})
appVersionCode: number;
#ApiModelProperty({
example: false,
default: false
})
testerMode: boolean;
#ApiModelProperty({
example: 1,
default: 1
})
appId: number;
}
export class IApiGenericRequestUserId extends IApiGenericRequest {
#ApiModelProperty({
example: 1,
default: 1
})
userId: number;
}
class IApiEventsV2UserDetails extends IApiGenericRequestUserId {
#ApiModelProperty({
example: 1
})
eventId: number;
#ApiModelProperty({
example: false
})
loadMap: boolean;
}
Example route:
#Post('details')
#ApiResponse({
status: 200,
description: 'Get event user details',
type: null
})
async details(#Res() res: Response, #Body() body: IApiEventsV2UserDetails) {
// call service
}
In Swagger UI the request example is shown properly:
{
"appVersionCode": null,
"testerMode": false,
"appId": 1,
"userId": 25,
"eventId": 5,
"loadMap": false
}
When imported in Postman it looks like this:
{
"appVersionCode": "<number>",
"testerMode": "<boolean>",
"appId": 1,
"userId": 25,
"eventId": "<number>",
"loadMap": "<boolean>"
}
I can't figure out what happens here and how can it be fixed.