Getting a 500 when post some raw json to a triggered pipeline

Here’s my latest effort, I cut down the json to something a little more manageable :

{“Sourceidentification”:{“countryid”:“AAA”,“areaname”:“Somewhere”,“systemname”:“TOffice”},“Filemetadata”:{“rowcount”:“320”,“checksum”:“9424ADEABBFC7DFE7AF18DFFCB97C0FE”},“measurements”:{“distance”:[{“vehicleid”:“AB123CD”,“value”:“123456”,“document”:“20160419141000”,“date”:“2016-04-18”,“Time”:“”}]}}

{
“query_string”: “”,
“path”: “/api/1/rest/slsched/feed/xxxxxx/xxx/xxxxxxxxx/Measurements”,
“response_map”: {
“error_list”: [
{
“message”: “Pipeline failed to execute.”
}
]
},
“http_status”: “500 Internal Server Error”,
“http_status_code”: 500