{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x4b901fa15154a0a81022d4af70e51315b5669f0b028b6b9063a2bef6128e7f80",
    "signature": "0xa071d519cd7f738d33736a474eb28694b44f1eee66ec010ec654022e4bd0bad00a6891d58400ab32c204111cd25f47222238e16b9aa1b29cf799bf503fe470c01b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}