{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xfd7a94917c70243ffb7d117ddd69ada4864d642dfdc74bd54bd319aea9db548f",
    "signature": "0x60477ff66898f6b78e8728f2e39c420ead1dc74d438932ff2c4d0224cb155f103c4dc766f6a487d6c2bd192c7f94d6d0200388265b7d6414e49824b079314af41c",
    "signer": "0xb403F463a3BA5FA5381335034AB1a0F185E15b8F",
    "userId": "223452788"
  }
}