placeOrder missing parameter

[Jkennard]

Hi, having an issue with the placeOrder request. Here is my Json call
{"jsonrpc": "2.0",
"method": "SportsAPING/v1.0/placeOrders",
"params": {"marketId": 1.170718570 ,
"instructions":{"selectionId": 110503,
"handicap": "0",
"side": "BACK",
"orderType": "LIMIT",
"limitOrder": {"size": "2",
"price": 1.1,
"persistenceType": "LAPSE"}}},
"id": 1}

the response is
{'jsonrpc': '2.0', 'error': {'code': -32602, 'message': 'DSC-0018'}, 'id': 1}

the error code says

MandatoryNotDefined

Client

400

A parameter marked as mandatory was not provided

Cant for life of me find the parameter. Seems identical to the visualistion code.
Can anyone help?

[WTPooh]

marketId is string.
"marketId":"1.170718570"

[Jkennard]

Thanks for the reply, I don't think thats it. Normally this field is occupied by a variable which is used in all the API calls. All the other calls work fine with this variable so I dont see why placeOrders would have an issue with it.

[jabe]

Nine times out of ten the marketId doesn't end in zero. If something somewhere treats it as numeric, a final zero can get lost. Safer to stick it in quotes anyway.

[jabe]

The instructions parameter is expecting an array. Put square brackets around them.

[Jkennard]

The instructions parameter is expecting an array. Put square brackets around them.

Yes!!! Thank you so much.