This could be fixed using the Dodge Tool. Select the Dodge tool, and in the tool options along the top set the Range to "Midtones". Select a large fuzzy brush - larger than the size of the curve of the toe of the shoe print. A few clicks of the tool on each of the darker areas should be enough to fix it.
Press Q to activate the Quick Mask Mode to make two partial selections
Use the Gradient Tool from black to transparent and mask the top and bottom areas, hold Shift to make the gradient at 90º
Press Cmd + I Mac or Ctrl + I Win to invert the mask
Press Q to exit the Quick Mask Mode
Open the Levels Panel and increase the lightness moving the midtones slider ...