How to read a JSON for just one time and use it many time in the same robot file in Robot Framework

I am implementing a test automation framework with using robot framework. But i couldn't manage some JSON things.. I have a robot file full of keywords (no tests), i tried to read the json file (with full of xpaths) in test setup section, but it failed.

Is it possible to read the file at the beginning of a robot file and use that object for every keyword in that list?

Current structure:

keyword 1
  read json
  do sth

keyword 2
  read json
  do sth

keyword 3
  read json
  do sth

What i want?

read json

keyword 1
  do sth
keyword 2
  do sth
keyword 3
  do sth