CREATE TABLE `serviceSignatures` (
	`id` int AUTO_INCREMENT NOT NULL,
	`userId` int NOT NULL,
	`serviceName` varchar(100) NOT NULL,
	`signatureId` int NOT NULL,
	`createdAt` timestamp NOT NULL DEFAULT (now()),
	`updatedAt` timestamp NOT NULL DEFAULT (now()) ON UPDATE CURRENT_TIMESTAMP,
	CONSTRAINT `serviceSignatures_id` PRIMARY KEY(`id`),
	CONSTRAINT `user_service_unique` UNIQUE(`userId`,`serviceName`)
);