{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "409864235",
    "entityType": "User",
    "nonce": "0xd57901486c3064e1ffde01bb0a6c7ece78e1f8cb2771703c46465cd645d6f91a",
    "signature": "0xdc626f77a197663a52dd3e7108030a23b67b89e2b9e300c80cd873783d7000d8198eced1b67cfbd8f29052b751f359c395a34d83bf1a099d0fc0dbc794e053291c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}