I am currently trying to get historical data for NIFTY but it is always returning an empty frame

payload = "{\r\n "exchange": "NSE",\r\n "symboltoken": "26000",\r\n "interval": "ONE_MINUTE",\r\n "fromdate": "2021-02-08 09:00",\r\n "todate": "2021-02-08 09:16"\r\n}"
headers = {
'Content-Type': 'application/json',
'Accept': 'application/json',
'X-UserType': 'USER',
'X-SourceID': 'WEB',
'X-ClientLocalIP': '192.168.0.1',
'X-ClientPublicIP': '99.999.999.99',
'X-MACAddress': 'AA-AA-AA-AA-AA-AA',
'Authorization': 'Bearer '+TOKEN,
'Content-Type': 'application/json',
'Accept': 'application/json',
'X-PrivateKey': 'MY KEY'
}