Create array of objects(json) to send via http/post

MIT App Inventor Help
1

Does anyone could help me to create an array of objects in json format to send such message via web. Data are current time yyyyMMdd hh:mm:ss and RFID number.
What is expected is the following output:
[{time1,rfid1},{time2,rfid2}, ...].

Time(1,2,..) and RFID(1,2..) are ok. I would only a help to Join brackets and curly brackets with above indicated data to form the json Pattern to send by web.
Webservice (endpoint) has been implemented by another guy with token too.

2

Use the dictionary and list blocks to create a json strcuture:

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3

Super thank you. I Will implement and return.
Have a Nice day.