curl --request POST \
  --url https://api.iotools.cloud/v1/tool/json-merge-patch-tool \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "mode": "apply",
  "baseJson": "{\n  \"title\": \"Goodbye!\",\n  \"author\": {\n    \"givenName\": \"John\",\n    \"familyName\": \"Doe\"\n  },\n  \"tags\": [\"example\", \"sample\"],\n  \"content\": \"This will be unchanged\",\n  \"phoneNumber\": \"+01-123-456-7890\"\n}",
  "patchJson": "{\n  \"title\": \"Hello!\",\n  \"phoneNumber\": null,\n  \"author\": {\n    \"familyName\": null\n  },\n  \"tags\": [\"example\"]\n}",
  "indent": "2"
}
'

{
  "tool": "json-merge-patch-tool",
  "tool_version": "1.0.1",
  "outputs": {
    "output": "{\n  \"title\": \"Hello!\",\n  \"author\": {\n    \"givenName\": \"John\"\n  },\n  \"tags\": [\n    \"example\"\n  ],\n  \"content\": \"This will be unchanged\"\n}",
    "changes": [
      {
        "operation": "Replace",
        "path": "title",
        "new-value": "\"Hello!\""
      },
      {
        "operation": "Remove",
        "path": "phoneNumber",
        "new-value": ""
      },
      {
        "operation": "Remove",
        "path": "author.familyName",
        "new-value": ""
      },
      {
        "operation": "Replace",
        "path": "tags",
        "new-value": "[\"example\"]"
      }
    ]
  },
  "credits_used": 3,
  "credits_remaining": null
}