The insertJson method inserts metadata from a JSON string, LuaJsonObject, or LuaJsonArray, into the field.
insertJson ( json [, fieldName] )
| Argument | Description | 
|---|---|
| json | (string or LuaJsonArray or LuaJsonObject) The JSON to insert into the field. | 
| fieldName | (string) The name of a sub-field to add the JSON to. If you set this argument, a sub-field is created. If you do not set this argument, the JSON is added to the field that the method was called on. | 
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