user_id='iden1'
event_name = "new_event"
hook_data= {
  "anonymousId"=>nil,
  "channel"=>"server",
  "context"=>{"library"=>{"name"=>"simple_segment", "version"=>"0.1.1"}},
  "event"=>event_name,
  "integrations"=>{},
  "messageId"=>"api-bV5ZmieDrhHeMrqwsAqqUytqWec3q6EY",
  "originalTimestamp"=>"2017-09-10T00:32:29+08:00",
  "projectId"=>"3jjqD3uFsq",
  "properties"=>{},
  "receivedAt"=>"2017-09-09T16:32:30.575Z",
  "sentAt"=>"2017-09-09T16:32:29.000Z",
  "timestamp"=>"2017-09-09T16:32:30.575Z",
  "type"=>"track",
  "userId"=>user_id,
  "source"=>"dummysource1",
  "version"=>2
}.with_indifferent_access