Weird error when trying to insert data

[Leekao]

this is the data I'm trying to load:
[ { json: { ipnum: '16777216', countrycode: 'AU' } } ]

and this is the error I'm getting:
< events.js:85
< throw er; // Unhandled 'error' event
< ^
< SyntaxError: Unexpected end of input
< at Object.parse (native)
< at isKeyOk (/node_projects/csv_x/node_modules/bigquery/node_modules/google-api-utility/lib/gauth.js:76:52)
< at doJobWithAuth (/node_projects/csv_x/node_modules/bigquery/node_modules/google-api-utility/lib/gauth.js:94:18)
< at exports.request (/node_projects/csv_x/node_modules/bigquery/node_modules/google-api-utility/lib/gauth.js:118:3)
< at Object.exports.job.load (/node_projects/csv_x/node_modules/bigquery/lib/bqapi.js:49:5)
< at EventEmitter. (/node_projects/csv_x/csv_insert.js:57:19)
< at EventEmitter.emit (events.js:107:17)

Can you maybe shed some light on that error?