parameterized build issues with payload

[da...@danefetterman.com]

This is my attempt at working around the fact that I can't get any plugins to create new Jenkins jobs when a new unknown Gitlab project is created. 

I'm creating a new Jenkins job. It uses the parameterized build option using a string parameter of payload.

I have Trigger builds remotely enabled with a token selected.

The build is set to execute shell:

#!/bin/bash

echo "The payload is $payload"

In gitlab, I have a the following system hook:

https://JenkinsServer:8080/job/test/buildWithParameters?token=TOKEN_NAME

When I create new gitlab projects, the system hook is firing and the Jenkins job is kicking off however the echo of the $payload does not function. Can I only pass parameters via the url and not via json payload? Am I using an incorrect variable? 

To verify the post data I've setup a second system hook that hits http://requestb.in/ and got the following results:

FORM/POST PARAMETERS

None

HEADERS

X-Request-Id: 4f9a2ef0-bcb3-4813-9311-ae387c77d38b

Connect-Time: 0

Host: requestb.in

Total-Route-Time: 0

X-Gitlab-Event: System Hook

Connection: close

Content-Type: application/json

Via: 1.1 vegur

Content-Length: 304

RAW BODY

{"event_name":"project_destroy","created_at":"2016-03-10T20:12:09Z","name":"test-new-project1","path":"test-new-project1","path_with_namespace":"me/test-new-project1","project_id":26,"owner_name":"Dane","owner_email":"te...@test.com","project_visibility":"private"}