GUM JSON + HTTP Builder.

HTTPBuilder_JSON.groovy

@Grab(group='org.codehaus.groovy.modules.http-builder', module='http-builder', version='0.5.2')
import groovyx.net.http.*
import static groovyx.net.http.ContentType.*
import static groovyx.net.http.Method.*


def http = new HTTPBuilder( 'http://google.com' ) // Takes URL e.g. http://myservice:8087/

http.request( POST, JSON) { req ->
    
body = [ '{ "database":"tracking", "collectionData":[ { "collection":"events", "data":[ { "measurement": {"miles": 7.7, "hours": 0.9 }, "source": "onboard", "consumerId": 6, "date": {"data_type":"date_iso8601", "value":"2012-06-06T16:19:57.000Z"}, "metafields":{"name4":"value15", "name2":"value8"} } ] } ] }' ]
    
    headers.'User-Agent' = 'Mozilla/5.0 Ubuntu/10.10 Firefox/3.0.4'
    headers.'Referer' = 'http://quicklinuxsolutions.blogspot.com/'
    headers.'Content-Type' = 'application/json'

    uri.path = '/data'

    response.success = { resp, json ->
        println "SUCCESS!!"
    }
    response.failure = { resp ->
        println "FAIL"
    }
}