Description of problem:
We found inconsistency in API during automating cfme customisation. API call for create expect slightly different input format ten edit call. We made a patch which accept same content as create call. Pull request is here: https://github.com/ManageIQ/manageiq/pull/16747

Version-Release number of selected component (if applicable):
5.8.2.3

How reproducible:
HTTP POST to https://CMFE_IP/api/service_dialogs/55000000000002
for create working fine:
{
  "action" : "create",
  "resource" : {
    "label" : "updated_label",

      "dialog_tabs" : [
        "id" : 11,
        "label" : "updated_tab_label",
        "dialogs_groups" : [
          {
            "id" : 31,
            "dialog_fields" : [
               { "id" : 41 }
            ]
          }
        ]
      ]

  }
}

But for edit same thing with action: edit failing. There is necessary to add '"content" : {' before dialog_tabs.

{
  "action" : "edit",
  "resource" : {
    "label" : "updated_label",
    "content" : {
      "dialog_tabs" : [
        "id" : 11,
        "label" : "updated_tab_label",
        "dialogs_groups" : [
          {
            "id" : 31,
            "dialog_fields" : [
               { "id" : 41 }
            ]
          }
        ]
      ]
    }
  }
}




Steps to Reproduce:
1. HTTP POST to https://CMFE_IP/api/service_dialogs/55000000000002
{
  "action" : "create",
  "resource" : {
    "label" : "updated_label",

      "dialog_tabs" : [
        "id" : 11,
        "label" : "updated_tab_label",
        "dialogs_groups" : [
          {
            "id" : 31,
            "dialog_fields" : [
               { "id" : 41 }
            ]
          }
        ]
      ]

  }
}



2.HTTP POST to https://CMFE_IP/api/service_dialogs/55000000000002
{
  "action" : "edit",
  "resource" : {
    "label" : "updated_label",

      "dialog_tabs" : [
        "id" : 11,
        "label" : "updated_tab_label",
        "dialogs_groups" : [
          {
            "id" : 31,
            "dialog_fields" : [
               { "id" : 41 }
            ]
          }
        ]
      ]

  }
}


Actual results:
{
    "error": {
        "kind": "bad_request",
        "message": "Failed to update service dialog - DialogTab(#72444840) expected, got Hash(#15946100)",
        "klass": "Api::BadRequestError"
    }
}

Expected results:
{
    "href": "https://CFME_IP/api/service_dialogs/55000000000002",
    "id": 55000000000002,
    "description": "",
    "buttons": "submit,cancel",
    "label": "updated_label",
    "created_at": "2017-10-26T22:57:12Z",
    "updated_at": "2018-01-03T15:07:40Z"
}

Additional info: