{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "507325",
    "entityType": "User",
    "nonce": "0xdd5b6bd25a57fea139bcf7dcaff090d06fba7edb13b4aaf8b6805c327263286f",
    "signature": "0x58eee6b1af0898a8ba3c20a3e94260d9ddceb5961d6b9895b24f5a8b1bba5e117441f136e381c7910d897c546ebd94874be8062cac9aa9e079426a5c6f45a7dc1b",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}