Sagger example data

SampleController.java

@Operation(summary = "Send JSON push directly to the FCM API v1")
@ApiResponses(value = {
    @ApiResponse(
        responseCode = "200",
        description = "Success: our action has been completed",
        content = @Content(mediaType = "application/json",
        schema = @Schema(
            type = "SampleHttpResponseDto",
            example = "{\"status\":\"OK\",\"message\":\"sample OK answer\"}")))})
@PostMapping(value = "/resource", consumes = MediaType.APPLICATION_JSON_VALUE)
public SampleHttpResponseDto postRequest(
    @Parameter(
        name ="json",
        schema = @Schema(
            description = "additional description of the model",
            type = "string",
            example = "{\"status\":\"OK\",\"message\":\"message body\"}"))
    @RequestBody Map<String, Object> request
) {
  return new SampleHttpResponseDto(request.propert1, request.propert2);
}