{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "815248718",
    "entityType": "User",
    "nonce": "0x37d711e382daa96c6adc91d7974b49465b487912fbb56ccc6c615f61087d8325",
    "signature": "0x13d72a360496866273458dc621df7cb00994bfbf851bc0d7e2181db9d99bf425173d89d8ac4fa37b959441ec53ef43567ebf5bdcba2c6bb1fe7590e1b74533461c",
    "signer": "0xd489B786708CDd8661b152CFF27695dC12c8c0C9",
    "userId": "647391197"
  }
}