curl --location --request POST 'https://dev.your-api-server.com/api/rest/v1/canvas-init-image' \
--header 'content-type: application/json' \
--data-raw '{
"initExtension": "string",
"maskExtension": "string"
}'
{
"uploadCanvasInitImage": {
"initImageId": "string",
"initFields": "string",
"initKey": "string",
"initUrl": "string",
"maskImageId": "string",
"maskFields": "string",
"maskKey": "string",
"maskUrl": "string"
}
}