Is there a way to turn this deeply nested array into something more manageable?

Certainly! If you want to simplify access to the data, you can "flatten" the array or extract the relevant part into a new variable. Since it looks like the data you want is always at $propertyData['value'][0], you can assign that to a new variable:

$data = $propertyData['value'][0];

Now you can access the ListingId like this:

$listingId = $data['ListingId'];

If you want to make this more robust (in case the structure changes or the array is empty), you can add some checks:

if (isset($propertyData['value'][0])) {
    $data = $propertyData['value'][0];
    // Now you can safely use $data['ListingId']
} else {
    // Handle the case where the data isn't available
    $data = [];
}

Summary:
Extract the nested array to a new variable for easier access. This is a common and best practice approach when dealing with deeply nested or unnecessarily complex data structures.