converted to render json

app/controllers/api/v1/clients_controller.rb

@@ -4,8 +4,12 @@ module Api
       respond_to :json
 
       def create
-        @client = Client.create(client_params)
+        @client = Client.new(client_params)
-        respond_with(@client,status: :created) rescue error(409)
+        if @client.save
+          render :json => @client
+        else
+          render :json => { :errors => @client.errors.full_messages , :status => 422}.to_json
+        end
       end
 
       private