How to map request body to query parameter ?

[priyankapriya45]

Hello , 

I am working on a proxy where I need to implement the proxy in which request body should be sent as query parameter . I have tried to use AM policy with adding query parameters and EV policy with JSON payload, but it is not sending the correct request to target server. 

request :

{ 

"address1" :

{

"city" : A

}

}