Composing odata request for Configurator Service methods

[Salahudeen]

Could you please let me know how to compose the odata request object for method execution with the follwoing params.
{ "targetScope": { "Item": { "@aras.type": "Method", "@aras.action": "builder_method_name", "@aras.id": "item_id_componentA" } } }

Here is what i tried, but gets bad request error. Probably a trivial question...I am new to odata.

string odataUrl = innovatorUrl + "/server/odata/method.cfg_GetScopeStructure " + "{" + "\"targetScope\": {" + "\"Item\": {" + "\"@aras.type\": \"Method\"," + "\"@aras.action\": \"vm_scopeBuilder\"," + "\"@aras.id\": \"534B0B2819BD48D58E133D39E6BC596C\"" + "}" + "}" + "}";