{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "121201250",
    "entityType": "User",
    "nonce": "0xbae201e6f765d8de0ead08edd2fb04db44e64564a9e6e472613ea6e5b65769a3",
    "signature": "0x2a1921327a5763c7ae3808b57a1886da0dade76b43a0f99140bd5319e635f06d69d845655a38633c1de8ea46feda6f67bfc825aff5f248f5924bb095b0604a351b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}