第一个数组：
(6) [{…}, {…}, {…}, {…}, {…}, {…}__ob__: Observer]
0:
dataContent: "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAArIA"
topic: "名称"
1:
dataContent: (...)
topic: (...)

第二个数组：
(6) [Array(2), Array(3), Array(4), Array(3), Array(1), Array(1)]
0: Array(2)
0: {content: "户籍一", grand: 0, percent: 0, resultCount: 0, validPercent: 0}
1: {content: "户籍二", grand: 0, percent: 0, resultCount: 0, validPercent: 0}
length: 2
1: Array(3)
0: {content: "人均500元", grand: 0, percent: 0, resultCount: 0, validPercent: 0}
1: {content: "人均300元", grand: 0, percent: 0, resultCount: 0, validPercent: 0}
2: {content: "人均400元", grand: 0, percent: 0, resultCount: 0, validPercent: 0}
length: 3
2: (4) [{…}, {…}, {…}, {…}]
.....

求两个数组的数据合并(归并)
想要得到结果:
[
  {
    "dataContent": "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAArIA",
    "exportContent": [
      {
        "content": "户籍一",
        "grand": "0",
        "percent": "0",
        "resultCount": 0,
        "validPercent": "0"
      }
    ],
    "topic": "名称"
  }
]