cr, err := client.Permission.Expand(context.Background(), &v1.PermissionExpandRequest{
    TenantId: "t1",
    Metadata: &v1.PermissionExpandRequestMetadata{
        SnapToken: "",
        SchemaVersion: "",
    },
    Entity: &v1.Entity{
        Type: "repository",
        Id: "1",
    },
    Permission: "push",
})

client.permission.expand({
    tenantId: "t1",
    metadata: {
        snapToken: "",
        schemaVersion: ""
    },
    entity: {
        type: "repository",
        id: "1"
    },
    permission: "push",
})

curl --location --request POST 'localhost:3476/v1/tenants/{tenant_id}/permissions/expand' \
--header 'Content-Type: application/json' \
--data-raw '{
  "metadata": {
    "schema_version": "",
    "snap_token": ""
  },
  "entity": {
    "type": "repository",
    "id": "1"
  },
  "permission": "push"
}'

{
  "tree": {
    "entity": {
      "type": "<string>",
      "id": "<string>"
    },
    "permission": "<string>",
    "arguments": [
      {
        "computedAttribute": {
          "name": "<string>"
        }
      }
    ],
    "expand": {
      "operation": "OPERATION_UNSPECIFIED",
      "children": "<array>"
    },
    "leaf": {
      "subjects": {
        "subjects": [
          {
            "type": "<string>",
            "id": "<string>",
            "relation": "<string>"
          }
        ]
      },
      "values": {
        "values": {}
      },
      "value": {
        "@type": "<string>"
      }
    }
  }
}

{
  "code": 123,
  "message": "<string>",
  "details": [
    {
      "@type": "<string>"
    }
  ]
}