How to pass dates and times to HANA with oData?

Hello,

I want to pass the current date and time into a HANA table with corresponding fields (also of SQL type date resp. time) with an oData Service. My Python code looks like this:

[...]

headers = {"Content-type":'application/json';charset='utf-8'}

timestamp = int(time.time()*1000)

...

#payload = { 'KEY':'123', 'DATE':'/Date(1354665612344)/', 'VALUE':'24'}

#payload = { 'KEY':'123', 'DATE':'/Date(timestamp)/', 'VALUE':'24' }

#payload = { 'KEY':'123', 'DATE':'???, 'TIME':'???', 'VALUE':'24'}

r = requests.post(url, data=json.dumps(payload),headers=headers,auth=auth )

[...]

However:

The first payload line with the 13-digit integer 1354665612344 works.

The second payload line with the current timestamp does NOT work, although timestamp contains also a 13-digit integer.

My wish is actually the third payload line: Can anybody help me, what has to be passed over to the oData service for the fields DATE and TIME?

What would have to be passed over, if I would use a field of SQL type timestamp in the target HANA table

Thanks,

Ingo