"No JSON object could be decoded" error while creating an API

Not sure about any HTTP proxy on my part, but just trialling this TYK API, and also have come across this snag just now.

Installed without a hitch (my centOs VM)

Attempted the API creation via CMD,

curl -H “x-tyk-authorization: 352d20ee67be67f6340b4c0605b044b7” -s -H “Content-Type: application/json” -X POST -d ‘{“name”: “Test API”, “slug”: “test-api”, “api_id”: “1”, “org_id”: “1”, “auth”: { “auth_header_name”: “Authorization”}, “definition”: { “location”: “header”, “key”: “x-api-version” }, “version_data”: { “not_versioned”: true, “versions”: { “Default”: { “name”: “Default”, “use_extended_paths”: true } } }, “proxy”: { “listen_path”: “/test-api/”, “target_url”: “http://http://httpbin.org/”, “strip_listen_path”: true }, “active”: true }’ http://127.0.0.1:8080/tyk/apis/ | python -mjson.tool

Errors out.
No JSON object could be decoded

Looking at logs, not events whatsoever
And im tailing the lot of them via
tail -f /var/log/tyk-*

Tips Pointers appreciated