supplemental.rb

if data['supplemental_data']    
  data['supplemental_data'].inject({}) do |sum, parts|
    sum            
    key, value = parts              
    sum[key.to_sym] = value.values  
    sum
end              
else
  {}
end

#Here is the 'data' json which is converted into hash
#"supplemental_data": {
#  "groups": {
#   "144959": {
#    "id": 144959,
#    "name": "test3",
#    "last_modified": "2013-07-12T15:32:25+00:00",
#    "created": "2013-07-12T15:32:25+00:00"
#   }
#  }
# }
 

"supplemental_data": {
  "users": {
   "1242515": {
    "id": 1242515,
    "first_name": "Alexander",
    "last_name": "Luzzana",
    "group_id": 144959,
    "active": true,
    "employee_number": 4,
    "salaried": true,
    "exempt": false,
    "username": "aluzzana",
    "email": "[email protected]",
    "payroll_id": "4",
    "hire_date": "2012-07-01",
    "term_date": "0000-00-00",
    "job_title": "",
    "gender": "",
    "last_modified": "2013-07-12T15:52:00+00:00",
    "last_active": "2013-07-01T22:51:28+00:00",
    "created": "2013-05-28T20:23:44+00:00",
    "mobile_number": ""
   }
  },
  "jobcodes": {
   "17285791": {
    "id": 17285791,
    "parent_id": 0,
    "assigned_to_all": true,
    "billable": false,
    "active": true,
    "type": "pto",
    "has_children": false,
    "billable_rate": 0,
    "short_code": "",
    "name": "Sick",
    "last_modified": "2013-05-28T17:49:24+00:00",
    "created": "2013-05-28T17:49:24+00:00"
   },
   "17285793": {
    "id": 17285793,
    "parent_id": 0,
    "assigned_to_all": true,
    "billable": false,
    "active": true,
    "type": "pto",
    "has_children": false,
    "billable_rate": 0,
    "short_code": "",
    "name": "Vacation",
    "last_modified": "2013-05-28T17:49:24+00:00",
    "created": "2013-05-28T17:49:24+00:00"
   },
   "17285795": {
    "id": 17285795,
    "parent_id": 0,
    "assigned_to_all": true,
    "billable": false,
    "active": true,
    "type": "pto",
    "has_children": false,
    "billable_rate": 0,
    "short_code": "",
    "name": "Holiday",
    "last_modified": "2013-05-28T17:49:24+00:00",
    "created": "2013-05-28T17:49:24+00:00"
   },
   "17288283": {
    "id": 17288283,
    "parent_id": 0,
    "assigned_to_all": false,
    "billable": false,
    "active": true,
    "type": "regular",
    "has_children": false,
    "billable_rate": 0,
    "short_code": "dev",
    "name": "Development Team",
    "last_modified": "2013-05-28T20:19:33+00:00",
    "created": "2013-05-28T20:19:33+00:00"
   }
  }
 }
}```