{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "325",
    "entityType": "User",
    "nonce": "0x4090622104fbadca2a6366f524ec2c3d800e724431c9c075b93fe7a4927a6055",
    "signature": "0x6502f8d4442e3a5c2388f229e6f5c1da3b6bc8157bafca07f4f7dd3b926c26221194577ae2104f43c5eb4f05cfea7fbb299ec35e94e196d4184d895cf4c818801c",
    "signer": "0xb72e8a3DA14D2C1755c1F80FFdC075DB6260c697",
    "userId": "712229975"
  }
}