Get joint

const unit = 'k37Xlns198EHCtubX5X0kqbrnC9XYVTa0aFpR78gidM=';
​
client.api.getJoint(unit, function(err, result) {
  console.log(result);
});

{
  joint: {
    unit: {
      unit: 'k37Xlns198EHCtubX5X0kqbrnC9XYVTa0aFpR78gidM=',
      version: '1.0',
      alt: '1',
      witness_list_unit: 'oj8yEksX9Ubq7lLc+p6F2uyHUuynugeVq4+ikT67X6E=',
      last_ball_unit: '9tIFlniHyoVJEp0i+WHMTZqnnR1UqgAhrIWFRkgE8m0=',
      last_ball: 'qxl8Rq1IjVUICgbm9A1+d+ZC3pG75HoDEFTchdL6scg=',
      headers_commission: 344,
      payload_commission: 123,
      main_chain_index: 2870558,
      timestamp: 1529756195,
      parent_units: [
        '0V3X7wyTl/17YX83YbjFgyJ2LRNxbgT5jXQOdLvZR2A=',
        'HJoe07dHWj5fH5s7PMgwbtryM/o14YERshGVz4cP1BQ='
      ],
      authors: [
        {
          address: 'S7N5FE42F6ONPNDQLCF64E2MGFYKQR2I',
          authentifiers: {
            r: 'nNx6QBfwIQkZydLEDXs/di0U5wqFaw4L15OCGICFGkwDgDh3KK+ks5hxFoUhSLxiZZIeNt1gIjmpKFv+bIiDtQ=='
          }
        }
      ],
      messages: [
        {
          app: 'payment',
          payload_hash: 'g0eNA+42F6Zxx650BLNxUKAwx3R3HJ/pC1tjxXVg8Lg=',
          payload_location: 'inline',
          payload: {
            inputs: [
              {
                type: 'witnessing',
                from_main_chain_index: 580671,
                to_main_chain_index: 580684
              }
            ],
            outputs: [
              {
                address: 'S7N5FE42F6ONPNDQLCF64E2MGFYKQR2I',
                amount: 79
              }
            ]
          }
        }
      ]
    },
    ball: 'XRz6FcvpNLjrzXkCeQGIM/ekqQTrmB/kBEpn1grsrI0='
  }
}