@RestController
@RequestMapping("node-info")
class NodeInfoController(val nodeInfoService: NodeInfoService) {

    @PostMapping
    @ResponseStatus(HttpStatus.CREATED)
    fun saveNodeInfo(@RequestParam("file") file: MultipartFile) =   nodeInfoService.saveNodeInfo(file)
....

}

override fun saveNodeInfo(file: MultipartFile) {
        val configWrapper = file.bytes.deserialize<SignedNodeInfo>()
        val name = configWrapper.raw.deserialize().legalIdentities.first().name
    ...
}

override fun registerNodeInfo(nodeInfoFile: File): Mono<NodeInfoContainer> {
        val multipartBodyBuilder = MultipartBodyBuilder().apply {
            part("file", object : ByteArrayResource(nodeInfoFile.readBytes()){
                override fun getFilename(): String {
                    return nodeInfoFile.name
                }
            })
        }
        return webClient.post()
                .uri("/node-info")
                .syncBody(multipartBodyBuilder.build())
                .retrieve()
                .bodyToMono()
    }

override fun saveNodeInfo(file: MultipartFile, token : String ){
...
}