{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "54442",
    "entityType": "User",
    "nonce": "0x369a53b719614b8dcac5f48d4a646a9dfc0aae1c80f34946018afb385d4041ad",
    "signature": "0x547355f7c2f3617dcd3b17ff327ed81b399814179d1e02aa9ddbbb2bf14915e96a22088f91a8963951eae74b7ccfeb7e2cb030507ea7234c79a19c5f5468b06f1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}