Json Deserilization Issue

[aksgcg]

I got following issue throwing from assembly directly. Please have a look at it. Cannot deserialize the current JSON array (e.g. [1,2,3]) into type 'Square.Models.TerminalCheckout' because the type requires a JSON object (e.g. {"name":"value"}) to deserialize correctly. To fix this error either change the JSON to a JSON object (e.g. {"name":"value"}) or change the deserialized type to an array or a type that implements a collection interface (e.g. ICollection, IList) like List<T> that can be deserialized from a JSON array. JsonArrayAttribute can also be added to the type to force it to deserialize from a JSON array. Path 'checkout', line 1, position 14.