Option Underlying symbol. Read-only value sent in responses. It is ignored in requests.
Option expiry. Format is 'May21'. Read-only value sent in responses. It is ignored in requests.
Option 'put' or 'call'. Read-only value sent in responses. It is ignored in requests.
Option strike price. Read-only value sent in responses. It is ignored in requests.
{ "FullSymbol": "string", "SymbolType": "string", "Underlying": "string", "Expiry": "string", "PutOrCall": "string", "StrikePrice": 0.1, "Description": "string" }