{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "488430169",
    "entityType": "User",
    "nonce": "0x3a847f0b08e2cfa4030fa09ac36910d06c6e763b4ade563db656b2a933f13a72",
    "signature": "0xf45d7f538cd696eaf1abdd8b88e6c0236f172f527c25059038aee7adbe62fb14300e917819650dff2ccfa763f3554ef8685e24c709a7029ff1901d848f87798d1b",
    "signer": "0x99b5F46ae3978FB02A645f824e51700B327f1d6e",
    "userId": "97654"
  }
}