{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "718588868",
    "entityType": "User",
    "nonce": "0x4150d27469d39279752cb804b58a880b0a21acf964268abad01b81d3760f69b2",
    "signature": "0xea6b3e1062554ebc89109cab9871facdc8ec2416f54558807092be25725b3c3a7d0a7599036471b45a72d0ec707f560732e0faa0cf184f120b4a9e5f92f1438b1c",
    "signer": "0xd9e78908f0BeE3B3Ba494c4830051e688d199d3d",
    "userId": "379263871"
  }
}