Hi Team, Pls advice on the below request from Client - "Financial Times"

I'm trying to work out how to use this kind of format of request to get the current market value of the index. The idea would be to do this periodically throughout the day to produce automated text for our journalists to read that would say something like "The FTSE is up YY% from its open at XXXX, whereas the Hang Seng is down YY% from XXXX".

I may not be using the right request types, but I can't find your API documentation. The hub you have linked me to I've been through, and looked at the tutorials and various demos you have. Unfortunately I'm not proficient in C# so can't use your libraries, and would love any HTTP documentation you have that's more generic?

curl --location --request POST 'https://selectapi.datascope.refinitiv.com/RestApi/v1/Extractions/ExtractWithNotes' \
--header 'Prefer: respond-async' \
--header 'Content-Type: application/json' \
--header 'Authorization: Token XXX' \
--data-raw '{
"ExtractionRequest": {
"@odata.type": "#DataScope.Select.Api.Extractions.ExtractionRequests.IntradayPricingExtractionRequest",
"ContentFieldNames": [
"RIC",
"High Price",
"Low Price",
"Open Price",
"Previous Close Date",
"Previous Close Price",
"Trade Date",
"User Defined Identifier",
"Volume"
],
"IdentifierList": {
"@odata.type": "#DataScope.Select.Api.Extractions.ExtractionRequests.InstrumentIdentifierList",
"InstrumentIdentifiers": [
{ "Identifier": ".FTSE", "IdentifierType": "Ric" }
]
},
"Condition": { "ScalableCurrency": true }
}
}'