{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "512214950",
    "entityType": "User",
    "nonce": "0x872676b6de718d639b082d67f443766163c91c319b6f4faee6f24f370ecf025c",
    "signature": "0x83b9a5b2754374e4eb7d8dbb0cfe2b5931fa2b10d079a5c0c25bebfdce90692a5b010f318c9e7c0d83dea3e7c751036e412d4d5ef02b2238ebdf81db3fa17da31b",
    "signer": "0x94e0dDC50579175818AaCFBC9aba8B065fEf2a55",
    "userId": "460147282"
  }
}