Accepts the following message:
{
"timestamp": 1234567890,
"code": "3017620420009",
"rev": 194,
"product_type": "food",
"flavor": "off",
"user_id": "string",
"action": "updated",
"comment": "string",
"diffs": {
"fields": {
"change": [
"categories"
]
}
},
"ip": "string",
"client_id": "string"
}