curl --request POST \
  --url https://sandbox.tight.com/v6/integrations/wave/connection \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "businessId": "<string>",
  "glMapping": [
    {
      "glAccountId": "gla_12345",
      "importGlAccount": {
        "accountNumber": "<string>",
        "accountName": "<string>"
      }
    }
  ]
}
'

{
  "data": {
    "businessId": "<string>",
    "glMapping": [
      {
        "glAccountId": "gla_12345",
        "importGlAccount": {
          "accountNumber": "<string>",
          "accountName": "<string>"
        }
      }
    ]
  }
}