HAPI FHIR try to use patch

Question

I've this resource of type Paramaters as follow:

{
  "resourceType": "Parameters",
  "parameter": [
    {
      "name": "operation",
      "part": [
        {
          "name": "type",
          "valueCode": "add"
        },
        {
          "name": "path",
          "valueString": "Organization"
        },
        {
          "name": "name",
          "valueString": "active"
        },
        {
          "name": "value",
          "valueString": "true"
        }
      ]
    }
  ]
}

Because I want to add active value on my Organization.

So I write, in according with HAPI FHIR documentation - 4.2.7 paragraph, this code to execute a patch:

fhirClientR4Configuration.clientFhihrR4().patch().withBody(body).withId("Organization/2381").execute();

But I have this error:

ca.uhn.fhir.rest.server.exceptions.InvalidRequestException: HTTP 400 : Cannot deserialize instance of java.util.ArrayList<com.github.fge.jsonpatch.operation.JsonPatchOperation> out of FIELD_NAME token at [Source: UNKNOWN; line: -1, column: -1]

I've noticed I must put in the same array all informations about patch (in the tag part), but I don't know I can resolve it.

Tha HAPI FHIR version is 4.2.0