curl -i -X PATCH \
  'https://developer.sprinklr.com/_mock/apis/sprinklr-v3/message/workflow?messageId=string&umId=string' \
  -H 'Authorization: Bearer <YOUR_Token_HERE>' \
  -H 'Content-Type: application/json' \
  -H 'Key: YOUR_API_KEY_HERE' \
  -d '{
    "assignment": {
      "assigneeId": "string",
      "assigneeType": "string",
      "assignedById": 0,
      "assignmentTime": 0
    },
    "customProperties": {
      "property1": [
        "string"
      ],
      "property2": [
        "string"
      ]
    },
    "addedCustomProperties": {
      "property1": [
        "string"
      ],
      "property2": [
        "string"
      ]
    },
    "removedCustomProperties": {
      "property1": [
        "string"
      ],
      "property2": [
        "string"
      ]
    },
    "clientCustomProperties": {
      "property1": [
        "string"
      ],
      "property2": [
        "string"
      ]
    },
    "addedClientCustomProperties": {
      "property1": [
        "string"
      ],
      "property2": [
        "string"
      ]
    },
    "removedClientCustomProperties": {
      "property1": [
        "string"
      ],
      "property2": [
        "string"
      ]
    },
    "addedQueues": [
      0
    ],
    "removedQueues": [
      0
    ],
    "addedClientQueues": [
      0
    ],
    "removedClientQueues": [
      0
    ],
    "sentiment": 0,
    "note": "string",
    "message": "string",
    "content": {
      "title": "string",
      "titleHash": "string",
      "text": "string",
      "textHash": "string",
      "richText": "string",
      "postbackPayload": "string",
      "attachment": {
        "type": "IMAGE",
        "assetId": "string",
        "attachmentOptions": [
          {
            "channelType": "FACEBOOK",
            "accountId": 0,
            "embeddable": true,
            "category": "string",
            "noStory": true,
            "secret": true,
            "blockSocialActions": true,
            "expirationEnabled": true,
            "expirationDate": 0,
            "deletePost": true
          }
        ],
        "url": "string",
        "urlHash": "string",
        "title": "string",
        "description": "string",
        "previewUrl": "string",
        "hashedPreviewUrl": "string",
        "mimeType": "string",
        "alternateText": "string",
        "height": 0.1,
        "width": 0.1,
        "encryptedUrl": "string",
        "sizeInBytes": 0
      },
      "templateId": "string",
      "isRichText": true
    },
    "clearAttachments": true,
    "appendAttachments": true
  }'