{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "190321",
    "entityType": "User",
    "nonce": "0x7c91f216d0306a8f75b0411fb6a6b51351a6dad462f928d5e55a963c122a5693",
    "signature": "0x533576a85bf1f61923b84c58d775640b6529a1592a3584e61a2fe5e645552e02577414f645c1ab45caf222d409896a117d029af42f75d7a438198557b9b388d41c",
    "signer": "0x24844077bE6bb825c0548F36B4EFA030d05Ee1CD",
    "userId": "601282125"
  }
}