How to interpret bounding box export dimensions

I have a set of images that are annotated with bounding boxes. I have exported the necessary data for each image. Ultimately, I am trying to convert the bounding box coordinates to be used by GCP Vertex AI.

However, I can’t seem to interpret what Labelbox is giving me. Here is an example of what the export provides for bounding box coordinates:

'bbox': {'top': 698, 'left': 393, 'height': 951, 'width': 3178}

How do I interpret these dimensions?