{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "843421708",
    "entityType": "User",
    "nonce": "0x67fb80a6bf3a0c9d068faff1cac219003cd5380e2a1b446afbef0b13d3ca8b98",
    "signature": "0xb63d4e2689e64393e452a8df5e75b547048bb5b7e5516fc8aa029d89b4bacf526ee367f4e85ca26b578e8fdbaf000236fb4e9458c7f684fcb02401d7213cc3711c",
    "signer": "0x2B171214e998033E806F72301307B2160CD94DdB",
    "userId": "489165782"
  }
}