Problem solved. Oleg showed me that there is an only way to define URL parameter for inlineEditing when you are using 'actions' column (edit and delete buttons column near each row).

You have to set 'url' property at 'formatOptions', that will be default URL for editing and delete rows unless you specify on 'delOptions' another URL at 'url' property of 'delOptions' or 'url' property of 'editOptions' (ONLY for form editing). Inline edit options don't have a property like those to specify an URL, then it uses 'default' URL editing specified at 'url' property of 'formatOptions'.

I hope this will help to someone that had my same problem.

Best regards.