{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "540529323",
    "entityType": "User",
    "nonce": "0xb2b7d1cc4e753a378efd2d34ff15ceef2d393d4e9542e8352ee9633ff0c5a3e6",
    "signature": "0x7e27a21413ec00f518d362c91a14c8071f12867441aa6fb7ee4e65f65784e1456b8df7b78567a312893bf9027e1032c0e03e298400b975bcf27ab86451c09f061b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}