@RequestMapping("/{id}")
public String getNetworkDetails(Model model, @PathVariable String id) throws JsonProcessingException{

    model.addAttribute("poolHashrates", findAndDisplayDataService.getAllPools(Long.valueOf(id)));
    model.addAttribute("poolDataJson", findAndDisplayDataService.returnPoolsAsJson(Long.valueOf(id)));

    return "networkDetails :: modalContents";
}

<script>
    var data = eval('('+'${poolDataJson}'+')');
    console.log(data);
</script>

Uncaught SyntaxError: Unexpected token {