gocd bad request

{
  "pipeline": {
    "group": "",
    "_links": {
      "self": {
        "href": "http://127.0.0.1:8153/go/api/admin/pipelines/test-pipeline3"
      },
      "doc": {
        "href": "https://api.gocd.org/#pipeline-config"
      },
      "find": {
        "href": "http://127.0.0.1:8153/go/api/admin/pipelines/:pipeline_name"
      }
    },
    "name": "test-pipeline3",
    "label_template": "${COUNT}",
    "parameters": [],
    "environment_variables": [],
    "materials": [
      {
        "type": "git",
        "attributes": {
          "url": "https://github.com/drewsonne/terraform-provider-gocd.git",
          "invert_filter": false,
          "auto_update": true,
          "branch": "master",
          "stage": ""
        }
      }
    ],
    "stages": [
      {
        "name": "test",
        "fetch_materials": false,
        "clean_working_directory": false,
        "never_cleanup_artifacts": false,
        "approval": {
          "type": ""
        },
        "jobs": [
          {
            "name": "test",
            "tasks": [
              {
                "type": "exec",
                "attributes": {
                  "run_if": [
                    "success"
                  ],
                  "command": "echo",
                  "arguments": [
                    "test"
                  ]
                }
              }
            ]
          }
        ]
      }
    ],
    "version": "666d0bf360c3a8bbefda8578994959d2--gzip"
  }
}