corrector.js

const test = { Item:[ { Name: 'Amount', Value: 5 },{ Name: 'MpesaReceiptNumber', Value: 'LI85581A6Z' },{ Name: 'Balance' }, {Name: 'TransactionDate', Value: '20170908181744' }, { Name: 'PhoneNumber', Value: '254723587767' } ] }

const corrected = {}

test.Item.map(node=>corrected[node.Name] = node.Value)

console.log(corrected)

// { Amount: 5,
//   MpesaReceiptNumber: 'LI85581A6Z',
//   Balance: undefined,
//   TransactionDate: '20170908181744',
//   PhoneNumber: '254723587767' }