{
   "Units": "rad/s",
   "IntendedFor": "func/sub-01_task-motor_bold.nii.gz"
}

sub-<participant_label>/[ses-<session_label>/]
    fmap/
        sub-<label>[_ses-<session_label>][_acq-<label>][_run-<run_index>]_magnitude.nii[.gz]
        sub-<label>[_ses-<session_label>][_acq-<label>][_run-<run_index>]_fieldmap.nii[.gz]
        sub-<label>[_ses-<session_label>][_acq-<label>][_run-<run_index>]_fieldmap.json