{
  "schema": "https://developer.microsoft.com/json-schemas/sp/view-formatting.schema.json",
  "rowFormatter": {
    "elmType": "a",
    "attributes": {
      "target": "_blank",
      "href": "='mailto:some@user.com?subject=Hello&body=https%3A//myurl.com%3Fparam1%3D1%26param2%3D2%26ID%3D' + [$ID] + 'n another text'"
    },
    "txtContent": "[$Title]"
  }
}