{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xb144bfb47fd1590d0d0d2405ba1cb322aabe9d63aa50fea050c3a6b07b506232",
    "signature": "0x6cf1d35aeea9221f6eae4011b15ed34b7c0b602c8e8998eef35c19cf79ab3b3d44fb0db835dc538c1ad85eed7737e2188dbbcdfdb5b4f286274e9d4594598e501c",
    "signer": "0x40f93A625960bCa5B0ecF1C6D260270712F75807",
    "userId": "337413910"
  }
}