{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "319048",
    "entityType": "User",
    "nonce": "0xb9a3721a32b3f1d31351af1c4711a41b2b80aea981fb4276051e6f09f3838e05",
    "signature": "0x97e6ba72f7f594ea017baef6282615bbb2cbb3d9c04c160eed06d88a8fa28c8e73f8871a9981c9df8d7bf0271217dcdf39ae98b1f5fe2a6a18d5ec91b61eb53f1b",
    "signer": "0x4391C746E11181B87164C3C6DcB2EA773D749ECD",
    "userId": "729432364"
  }
}