{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "55500",
    "entityType": "User",
    "nonce": "0xfee5a48b6c9dfbfd9634b7899e95783d381cbfc1f36948737058dc860db7d938",
    "signature": "0xc5ae255893192da681cc29e1c1e8b423fd46e6dc11a55007f19fd5e67dedd5d6342442a1af336a52ab9896db92fd0a065e21a01655ad4ffd2365df10759e12261b",
    "signer": "0xAD70397544Ee4e82a6AB7EA8365282a449a99DBD",
    "userId": "640375784"
  }
}