{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "10449019",
    "entityType": "User",
    "nonce": "0x4ef2204cec1786df4f627d60d23d49d013b57c130e87622427a7a26dad92bf00",
    "signature": "0x43493ad0054cccf5fcbdeb6bcd8649e7e5ca1467b45b3ba35ad631b9ca19f5fb24e8210270d56a9aca9a9cb537ad450c0e8489bb22eab45fb4ba865c2c9f3de21c",
    "signer": "0x03b70C3825d7b9e568C53C89a738061d855d0dec",
    "userId": "578849678"
  }
}