I don't know what SoC you are planning to use when you say nRF52 chip. But lets say you want to use the nRF52832, you can take a look in the product specifications and Reference circuitry.
That states:
Documentation for the different
package reference circuits, including
Altium Designer files, PCB layout
files, and PCB production files can be
downloaded from Reference layout nRF52
Series.
Let me know if there is something else you are looking for, and I will try to help you as best as I can.
