Proper way to declare JSON object in Typescript

I have the following JSON object in my Angular 2 app and would like to know what is the proper what to declare it in typescript.

data = [
{
'id':1,
'title':'something'
'node': [
{
'id':1,
'title':'something'
'node': []
}
]
},
{
'id':2,
'title':'something'
'node': [
{
'id':1,
'title':'something'
'node': []
}
]
}
]

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