curl.bash

curl https://{subdomain}.zendesk.com/api/v2/tickets/{id}.json \
  -H "Content-Type: application/json" \
  -d '{"ticket":{"status":"solved",   \
       "comment":{"public":true, "body": "Thanks, this is now solved!"}}}' \
  -v -u {email_address}:{password} -X PUT

curl.rb

require 'rest_client'

subdomain = 'redboothconnector'
id = 3
email_address = 'andres.bravo@redbooth.com'
password = 't3stz3nd3sk'

resource = RestClient::Resource.put( "https://#{subdomain}.zendesk.com/api/v2/tickets/#{id}.json", { :user => email_address, :password => password})
resource.post(
  {
    "ticket" => { 
      "status" => "solved",
      "comment" => {
        "public" => true,
        "bady" => "Thanks, this is now solved!"
      }
    }
  }.to_json,
  :content_type => :json, 
  :accept => :json
)