{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x7a033788872f1469859596658e5d37ec2d12a6b6bd2bb1b053abc1639ee49259",
    "signature": "0xace59eff3b99a0421083c0a771436075975a628154855f1346efa2eb4422edc322b6eb71b77ef6b901b1f39832abafe52c03695df7cd4e48c350e8b0a1e00bcd1b",
    "signer": "0x8E3A4E1A0d1Aa7628E0FDbc872062F921A449403",
    "userId": "552753858"
  }
}