Save your table in CSV format, then use one of the online tools to convert it to JSON. Here is the first result from google.
Then you'll need to manually modify JSON for Construct format. Here are a few examples:
{"c2dictionary":true,"data":{"a":409,"b":473,"h":643,"f":313,"l":394}}
{"c2array":true,"size":[4,1,1],"data":[[[73]],[[55]],[[76]],[[40]]]}
.
Note, that if you are going to load JSON directly from a string, you'll have to double all quotation marks:
MyArray load from JSON string "{""c2array"":true,""size"":[4,1,1],""data"":[[[73]],[[55]],[[76]],[[40]]]}"