``variables``optional, object Variables can only be set for resumimg a single order that position is not at the beginning of its workflow's scope.
Otherwise an error is raised.
It change the returned variables of the previous jobs.
An object with key-value pairs. The value can be a string, number or boolean

"variables": {
      "myString": "stringValue",
      "myNumber": 3.14,
      "myBoolean": true
    }