Let's break down Psalm 119:32: "I run in the path of your commandments, for you have set my heart free. HEY"

"I run in the path of your commandments": This speaks to a proactive and enthusiastic obedience to God's laws. It's not just a slow walk, but a "run." This suggests a sense of eagerness, joy, and purpose in following God's will. The person isn't being dragged along; they are actively choosing and joyfully pursuing obedience.

"for you have set my heart free": This is the key to understanding why the psalmist is running. Obedience is not seen as a burden, but as a consequence of liberation. God's grace has freed the psalmist from something – likely sin, guilt, fear, or the empty pursuits of the world. This freedom then empowers and motivates them to live according to God's commandments.

"HEY": In the Hebrew text, this word is often translated as "He." It's part of the Hebrew alphabet, and many scholars believe that Psalm 119 is structured alphabetically, and each section begins with a corresponding letter of the Hebrew alphabet.
Sometimes, "He" is simply to indicate this alphabetical structure
Other times, it is a reminder of God's name
Still, others are more inclined to believe it represents an expression of the speaker

In essence, the verse is saying:

True freedom comes from a relationship with God.
This freedom empowers a person to joyfully and actively obey God's commands.
Obedience is not a means to earn freedom, but a natural outflow of it.

Think of it like this:

Imagine someone struggling with addiction. They feel trapped and enslaved. If they find freedom from that addiction, they will likely be motivated to live a healthy and productive life, following a different "path" than the one that led to their enslavement. In the same way, the psalmist has experienced freedom from spiritual bondage and now joyfully follows God's commands as a way of living in that freedom.

The verse highlights the transformative power of God's grace and the joyful obedience that results from a heart set free.