curl --request POST \
  --url https://sandbox.nmbr.co/services/payroll/overtime_rates \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "pay_rate_id": "<id>",
  "rate_multiplier": "1.5",
  "tag_assignment": {
    "unit": "percentage",
    "tag_allocations": [
      {
        "tags": [
          "<id>"
        ],
        "value": 100
      }
    ]
  }
}
'

{
  "id": "<id>",
  "object": "overtime_rate",
  "data": {
    "pay_rate": {
      "id": "<id>",
      "object": "pay_rate",
      "links": {
        "self": "/pay_rates/<id>"
      }
    },
    "title": "1.5x",
    "title_translated": "1.5x",
    "rate_multiplier": 1.5,
    "hourly_rate": 22.5,
    "hourly_rate_override": null,
    "business_preset": null,
    "expense_accounting_code": null,
    "liability_accounting_code": null,
    "archived_at": null,
    "is_editable": true,
    "is_deletable": true,
    "external_ref": null,
    "created_at": "2026-01-01T00:00:00.000000Z",
    "updated_at": "2026-01-01T00:00:00.000000Z"
  },
  "links": {
    "self": "/overtime_rates/<id>"
  }
}