Can anyone assist with my third party pixel tracking issue?

I am having problems with the tracking pixel.
I consulted this page: https://help.shopify.com/en/manual/orders/notifications/email-variables#order-fulfillment and changed total_price to subtotal_price
I would like to receive from Shopify on my pixel the subtotal_price ( The subtotal doesn’t include taxes (unless taxes are included in the prices) or shipping costs.)

Can anyone help me with this?
I entered this pixel on Shopify but I keep getting the total_price

This is the pixel:

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