not working properly

[samsema4]

File Input

    echo '{"event": {"event1": "test_1", "asdf":"asdf"}}' >> /tmp/test.log

Error Log

    2018-08-01 15:01:10 +0530 [error]: #0 https://goldeneggs.splunkcloud.com/services/collector: 400 (Bad Request)
    {"text":"Invalid data format","code":6,"invalid-event-number":0}

Config file

<source>
  @type tail
  path /tmp/test.log
  read_from_head true
  pos_file /tmp/test.log.pos
  tag test.*
  format json
</source>

<match fluent.info>
   @type stdout
</match>

<match **>
    @type splunk-http-eventcollector
    server goldeneggs.splunkcloud.com
    verify false
    token <<my_token>>

    host sams-testenv
    source fluent
    sourcetype fluent

    time_format localtime
    format json

    # Memory buffer with a short flush internal.
    buffer_type memory
    buffer_queue_limit 16
    buffer_chunk_limit 8m
    flush_interval 1s
</match>


<match **>
   @type stdout
</match>

In my splunk, I can see the fluentd.error and fluentd.info but not the logs I want to send. please help !!!