[How can I use the eigensolvers configs in eigen_examples?]

[fan1997]

Eigen Solvers
I'm confused about how to convert this file into a correct json file that could be recieved by eigensover.c.
"default:config_version=2
default:eig_solver=JACOBI_DAVIDSON
default:eig_max_iters=128
default:eig_tolerance=1e-4
default:eig_which=largest

#gmres accelerator config
default:solver(main)=FGMRES
main:gmres_n_restart=10
main:preconditioner(amg)=NOSOLVER

#outer solver setup
main:convergence=RELATIVE_INI
main:norm=L2
main:use_scalar_norm=1
main:max_iters=20
main:tolerance=1e-2

#printing obtions
#main:print_solve_stats=1
#main:monitor_residual=1
#main:obtain_timings=1"