{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "210635",
    "entityType": "User",
    "nonce": "0x9977fbb36dd0e21ff101bad0242b994b905b5a12cfe79a5d84aef48e8f596a9d",
    "signature": "0xe64d802e3a8da9a50ca882bafcaac99eaddbff616d649e49c4e910d4451735be4fccb68a2fa1ffe981bc08586e5fd1771808e44eb71923f04a1d0b1ada0cab001b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}