acc = "starnote"
following = "lemooljiang"
key = "5Jmwkffffffffff"
json = JSON.stringify(
  ['follow', {
    follower: acc,
    following: following,
    what: ['blog']
  }])
this.steem.broadcast.customJson(key, [], [acc], 'follow', json, function(err, result) {
  console.log(111,err, result)
})