求助！请问这是什么数据结构，怎么把它转换为 json？

{
"root1"
{
"item1" "1"
"item2" "abc"

"item3"
{
"cell"
{
"cell1"
{
"cell1Name" "99"
}
"cell2"
{
"cell2Name" "cdb"
}
}
}

"item4" "valueI"
}

"root2"
{
"item1" "88"
"item2" "tg"

"item3"
{
"cell"
{
"cell1"
{
"cell1Name" "99"
}
"cell2"
{
"cell2Name" "ujh"
}

}
}

"item4" "valueb"
}
}