Json object

I need help to get below output.

[
{
“key1”:“value1”,
“key2”:“value2”
},
{

“key3”:“value3”,
“key4”:“value4”
}
]

expected result
{
“item”:
[
{
“key1”:“value1”,
“key2”:“value2”
},
{

“key3”:“value3”,
“key4”:“value4”
}
]
}

Thanks for your help.