Custom Widget – Pass settings to javascript handler

Hey there.
I just created a custom widget for showing cryptocurrencies prices on a line chart.
This widget has some controls like interval, cryptocurrency symbol and etc.
Now I want to pass these controls settings to javascript handler of widget and build API url based on these settings.

What is the best practice for this situation? I tried the below method:

protected function render($instance = []) {
		
		$settings = $this->get_settings_for_display();
		?>
		<canvas id="chart-<?=$this->get_id()?>" data-widget-settings="<?=json_encode($settings)?>" ></canvas>
		<?php
	}

but this outputs a lot of unneeded settings which is not seems to be good.

Thank you in advance.