FailedToDeserializeDatasetError using push dataset

[Dayspring]

{
"name": "PowerBI_Sample",
"tables": [
{
"name": "Table1",
"columns": [
{
"name": "Column1",
"dataType": "string"
},
{
"name": "Column2",
"dataType": "string"
}
],
"rows": [
["Row1_Value1", "Row1_Value2"],
["Row2_Value1", "Row2_Value2"],
["Row3_Value1", "Row3_Value2"],
["Row4_Value1", "Row4_Value2"]
]
}
]
}

Getting the below error when sending the above dataset.

{
  "error": {
    "code": "FailedToDeserializeDatasetError",
    "pbi.error": {
      "code": "FailedToDeserializeDatasetError",
      "parameters": {},
      "details": [],
      "exceptionCulprit": 1
    }
  }
}