I am submitting the below request but getting error. Below is the error details along with the request. If I and sending this request to 
validate-submission API then I am getting the successful response.
Can you please let me know what is the issue with this request asap so that I can correct this during the developer preview period.
Error:
{
  "error": {
    "type": "ValidationError",
    "message": "invalid submission object",
    "details": [
      {
        "message": "field 'taxpayerIdentificationNumber' in Submission is invalid: taxpayerIdentificationNumber cannot be empty if entityType is individual or group",
        "path": "$.taxpayerIdentificationNumber"
      },
      {
        "message": "field 'entityType' in Submission is missing",
        "path": "$.entityType"
      },
      {
        "message": "field 'performanceYear' in Submission is missing",
        "path": "$.performanceYear"
      }
    ]
  }
}
Request:
{
  "submission": {
    "entityType": "individual",
    "taxpayerIdentificationNumber": "000123499",
    "nationalProviderIdentifier": "0760122099",
    "performanceYear": 2019
  },
  "measurements": [
    {
      "measureId": "PI_INFBLO_1",
      "value": true
    },
    {
      "measureId": "PI_ONCDIR_1",
      "value": true
    },
    {
      "measureId": "PI_ONCACB_1",
      "value": true
    },
    {
      "measureId": "PI_EP_1",
      "value": {
        "numerator": 1956,
        "denominator": 2451
      }
    },
    {
      "measureId": "PI_HIE_1",
      "value": {
        "numerator": 4267,
        "denominator": 4618
      }
    },
    {
      "measureId": "PI_HIE_4",
      "value": {
        "numerator": 4618,
        "denominator": 4753
      }
    },
    {
      "measureId": "PI_PEA_1",
      "value": {
        "numerator": 2029,
        "denominator": 2170
      }
    },
    {
      "measureId": "PI_PHCDRR_1",
      "value": true
    },
    {
      "measureId": "PI_PHCDRR_2",
      "value": true
    },
    {
      "measureId": "PI_PPHI_1",
      "value": true
    },
    {
      "measureId": "PI_PHCDRR_4",
      "value": true
    },
    {
      "measureId": "PI_PHCDRR_5",
      "value": true
    },
    {
      "measureId": "PI_PHCDRR_5",
      "value": true
    }
  ],
  "category": "pi",
  "submissionMethod": "registry",
  "performanceStart": "2019-01-01",
  "performanceEnd": "2019-12-31",
  "cehrtId": "0015EJR3MPX3HHA",
  "programName": "mips",
  "practiceId": ""
}