You may use a mix material in which you can pin one material for each of the textures and use a greyscale image as a mask for the amount, so that will tell how both materials should be blended.
Find attached a simple sample scene.
CONSULTA SOBRE TEXTURAS (QUESTION ABOUT TEXTURES)
Mm, this post looks strange - are You sure Mojave it shouldn't be as reply to some other thread? =)