PUT api/2.0/crm/case/filter/access
Host: yourportal.r7-office.ru
Content-Type: application/json
Accept: application/json

{
  "contactid": 1234,
  "isClosed": null,
  "tags": [
    "some text"
  ],
  "isPrivate": true,
  "accessList": [
    "00000000-0000-0000-0000-000000000000"
  ]
}

application/json

{
  "status": 0,
  "response": [
    {
      "createBy": {
        "id": "00000000-0000-0000-0000-000000000000",
        "displayName": "Mike Zanyatski",
        "title": "Manager",
        "avatarSmall": "url to small avatar",
        "profileUrl": ""
      },
      "created": "2022-10-07T10:03:01.4878919Z",
      "title": "Exhibition organization",
      "isClosed": false,
      "isPrivate": false,
      "canEdit": true,
      "customFields": [
        {
          "entityId": 14523423,
          "label": "Birthdate",
          "fieldValue": "2022-10-07T10:03:01.4878919Z",
          "fieldType": 5,
          "position": 10,
          "mask": "",
          "id": 0
        }
      ],
      "id": 0
    }
  ]
}

text/xml

<result>
  <status>0</status>
  <response>
    <createBy>
      <id>00000000-0000-0000-0000-000000000000</id>
      <displayName>Mike Zanyatski</displayName>
      <title>Manager</title>
      <avatarSmall>url to small avatar</avatarSmall>
      <profileUrl></profileUrl>
    </createBy>
    <created>2022-10-07T10:03:01.4878919Z</created>
    <title>Exhibition organization</title>
    <isClosed>false</isClosed>
    <isPrivate>false</isPrivate>
    <canEdit>true</canEdit>
    <customFields>
      <entityId>14523423</entityId>
      <label>Birthdate</label>
      <fieldValue>2022-10-07T10:03:01.4878919Z</fieldValue>
      <fieldType>5</fieldType>
      <position>10</position>
      <mask></mask>
      <id>0</id>
    </customFields>
    <id>0</id>
  </response>
</result>