Golang how to convert the map key is struct "json"

 
{
"A map" : {
{
"Name", "js", 
"Age" : 18 
}, {
"Id" : 10, 
"Port" : 1234 
} 
} 
} 

Convert

 
Type ST2 struct {
Id int ` json: "Id" ` 
The Port int ` json: "Port" ` 
} 

Type ST1 struct {
The Name string ` json: "Name" ` 
The Age int ` json: "Age" ` 
} 

Type ST struct {
Map a Map/ST1 ST2 ` json: "Map" ` 
} 

In short, received such a strange format "json", normal analysis method must not line, don't know what there are no other libraries can use