diff --git a/internal/provider/body.go b/internal/provider/body.go
index 68389a2..ee41289 100644
--- a/internal/provider/body.go
+++ b/internal/provider/body.go
@@ -14,12 +14,12 @@ import (
 // If compensateBaseAttrs is set, then any attribute path element only found in the base body will
 // be added up to the result body.
 func ModifyBody(base, body string, compensateBaseAttrs []string) (string, error) {
-	var baseJSON map[string]interface{}
+	var baseJSON interface{}
 	if err := json.Unmarshal([]byte(base), &baseJSON); err != nil {
 		return "", fmt.Errorf("unmarshal the base %q: %v", base, err)
 	}
 
-	var bodyJSON map[string]interface{}
+	var bodyJSON interface{}
 	if err := json.Unmarshal([]byte(body), &bodyJSON); err != nil {
 		return "", fmt.Errorf("unmarshal the body %q: %v", body, err)
 	}
@@ -82,11 +82,11 @@ func ModifyBodyForImport(base, body string) (string, error) {
 	if base == "" {
 		return body, nil
 	}
-	var baseJSON map[string]interface{}
+	var baseJSON interface{}
 	if err := json.Unmarshal([]byte(base), &baseJSON); err != nil {
 		return "", fmt.Errorf("unmarshal the base %q: %v", base, err)
 	}
-	var bodyJSON map[string]interface{}
+	var bodyJSON interface{}
 	if err := json.Unmarshal([]byte(body), &bodyJSON); err != nil {
 		return "", fmt.Errorf("unmarshal the body %q: %v", body, err)
 	}
diff --git a/internal/provider/resource.go b/internal/provider/resource.go
index eb085cc..e191c19 100644
--- a/internal/provider/resource.go
+++ b/internal/provider/resource.go
@@ -1073,7 +1073,7 @@ type importSpec struct {
 
 	// Body represents the properties expected to be managed and tracked by Terraform. The value of these properties can be null as a place holder.
 	// When absent, all the response payload read wil be set to `body`.
-	Body map[string]interface{}
+	Body interface{}
 }
 
 func (Resource) ImportState(ctx context.Context, req resource.ImportStateRequest, resp *resource.ImportStateResponse) {
@@ -1109,7 +1109,7 @@ func (Resource) ImportState(ctx context.Context, req resource.ImportStateRequest
 	}
 
 	var body string
-	if len(imp.Body) != 0 {
+	if imp.Body != nil {
 		b, err := json.Marshal(imp.Body)
 		if err != nil {
 			resp.Diagnostics.AddError(
diff --git a/internal/provider/resource_dead_simple_json_server_test.go b/internal/provider/resource_dead_simple_json_server_test.go
new file mode 100644
index 0000000..c7ad36b
--- /dev/null
+++ b/internal/provider/resource_dead_simple_json_server_test.go
@@ -0,0 +1,116 @@
+package provider_test
+
+import (
+	"context"
+	"fmt"
+	"net/http"
+	"os"
+	"testing"
+
+	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/resource"
+	"github.com/hashicorp/terraform-plugin-sdk/v2/terraform"
+	"github.com/magodo/terraform-provider-restful/internal/acceptance"
+	"github.com/magodo/terraform-provider-restful/internal/client"
+)
+
+const RESTFUL_DEAD_SIMPLE_SERVER_URL = "RESTFUL_DEAD_SIMPLE_SERVER_URL"
+
+type deadSimpleServerData struct {
+	url string
+}
+
+func (d deadSimpleServerData) precheck(t *testing.T) {
+	if d.url == "" {
+		t.Skipf("%q is not specified", RESTFUL_DEAD_SIMPLE_SERVER_URL)
+	}
+	return
+}
+
+func newDeadSimpleServerData() deadSimpleServerData {
+	return deadSimpleServerData{
+		url: os.Getenv(RESTFUL_DEAD_SIMPLE_SERVER_URL),
+	}
+}
+
+func TestResource_DeadSimpleServer_Basic(t *testing.T) {
+	addr := "restful_resource.test"
+	d := newDeadSimpleServerData()
+	resource.Test(t, resource.TestCase{
+		PreCheck:                 func() { d.precheck(t) },
+		CheckDestroy:             d.CheckDestroy(addr),
+		ProtoV6ProviderFactories: acceptance.ProviderFactory(),
+		Steps: []resource.TestStep{
+			{
+				Config: d.basic("foo"),
+				Check: resource.ComposeTestCheckFunc(
+					resource.TestCheckResourceAttrSet(addr, "output"),
+				),
+			},
+			{
+				ResourceName:            addr,
+				ImportState:             true,
+				ImportStateVerify:       true,
+				ImportStateVerifyIgnore: []string{"create_method"},
+				ImportStateIdFunc: func(s *terraform.State) (string, error) {
+					return `{"id": "test", "path": "test", "body": [{"foo": null}]}`, nil
+				},
+			},
+			{
+				Config: d.basic("bar"),
+				Check: resource.ComposeTestCheckFunc(
+					resource.TestCheckResourceAttrSet(addr, "output"),
+				),
+			},
+			{
+				ResourceName:            addr,
+				ImportState:             true,
+				ImportStateVerify:       true,
+				ImportStateVerifyIgnore: []string{"create_method"},
+				ImportStateIdFunc: func(s *terraform.State) (string, error) {
+					return `{"id": "test", "path": "test", "body": [{"foo": null}]}`, nil
+				},
+			},
+		},
+	})
+}
+
+func (d deadSimpleServerData) CheckDestroy(addr string) func(*terraform.State) error {
+	return func(s *terraform.State) error {
+		c, err := client.New(context.TODO(), d.url, nil)
+		if err != nil {
+			return err
+		}
+		for key, resource := range s.RootModule().Resources {
+			if key != addr {
+				continue
+			}
+			resp, err := c.Read(context.TODO(), resource.Primary.ID, client.ReadOption{})
+			if err != nil {
+				return fmt.Errorf("reading %s: %v", addr, err)
+			}
+			if resp.StatusCode() != http.StatusNotFound {
+				return fmt.Errorf("%s: still exists", addr)
+			}
+			return nil
+		}
+		panic("unreachable")
+	}
+}
+
+func (d deadSimpleServerData) basic(v string) string {
+	return fmt.Sprintf(`
+provider "restful" {
+  base_url = %q
+}
+
+resource "restful_resource" "test" {
+  path = "test"
+  create_method = "PUT"
+  body = jsonencode([
+  {
+  	foo = %q
+  }
+])
+}
+`, d.url, v)
+}