{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "450479972",
    "entityType": "User",
    "nonce": "0xa638dd306ebc027412980b6ba127d3eee507ead9712ab52b1a65e66d878c1b91",
    "signature": "0x5d7eb7936c03a2c0e50a34e7cedf1f7f1707a802b5a61bd5eab29bae90875ea007c163473ce4760e78a49ed9f1fe12c38943e780a3f4a17a9ce49b3992f37ea01c",
    "signer": "0xfc589450A34B7D25aFe38A17B179718108fB7b9D",
    "userId": "899796889"
  }
}