{
  "RequestItems": {
    "tablename1": [{
      "PutRequest": {
        "Item": {
          "key1": {
            "N": "1"
          },
          "key2": {
            "S": "value2"
          }
        }
      }
    }, {
      "PutRequest": {
        "Item": {
          "key3": {
            "S": "value3"
          },
          "key4": {
            "S": "value4"
          }
        }
      }
    }],
    "tablename2": [{
      "PutRequest": {
        "Item": {
          "key5": {
            "N": "5"
          },
          "key6": {
            "S": "value6"
          }
        }
      }
    }, {
      "PutRequest": {
        "Item": {
          "key7": {
            "S": "value7"
          },
          "key8": {
            "S": "value8"
          }
        }
      }
    }]
  }
}