Get EPS submission by tax year and submission ID

curl --request GET \
  --url https://api.sandbox.flowpayroll.ai/v1/rti/eps/{taxYear}/submissions/{submissionId} \
  --header 'X-Auth-Token: <api-key>'

{
  "message": {
    "text": "<string>",
    "token": "<string>",
    "tokenArguments": [
      {
        "name": "<string>",
        "value": "<string>"
      }
    ]
  },
  "content": {
    "data": {},
    "metadata": {
      "dateFormat": "yyyy-MM-dd",
      "dateTimeFormat": "yyyy-MM-ddTHH:mm:ss.fffZ",
      "paginationToken": "<string>"
    }
  },
  "validationIssues": [
    {
      "field": "<string>",
      "reason": "<string>",
      "reasonToken": "<string>",
      "reasonTokenArguments": [
        {
          "name": "<string>",
          "value": "<string>"
        }
      ]
    }
  ],
  "messageToken": "<string>",
  "data": {
    "submissionId": "EPS_2025_001",
    "taxYear": 2025,
    "organisationId": "org_123",
    "hmrcEpsReportStatus": "Sent",
    "createdDate": "2025-01-01T00:00:00Z",
    "createdBy": "user_123",
    "updatedDate": "2025-01-02T00:00:00Z",
    "updatedBy": "user_456",
    "taxMonth": 6,
    "submissionBody": "Submission body content",
    "correlationID": "corr_123",
    "submissionDate": "2025-01-01T00:00:00Z",
    "submissionResponse": "Response from HMRC",
    "errors": [
      "Error message 1",
      "Error message 2"
    ]
  }
}