{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1584941",
    "entityType": "User",
    "nonce": "0x1c9172754cc985080b379f904c88444116cc50ef2ebf6cda59d8a34f35dc4225",
    "signature": "0x8973c05b9cb62f93e2f0c65d8caf3e61adadb41937639ebabb9658c3a49cc3b11fa69c08d7a78977149d7b9baec903b4a1ab17fa03de549dccae821fcffde31e1b",
    "signer": "0xfEf199273dc1B7112aA0D32cc0DbF797aC6EAfE5",
    "userId": "198179849"
  }
}