{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x872b7fc0dc0a5ac8ec0e117e17f3cfddd2b98d49a8e6d711b99d6301108af62d",
    "signature": "0xaa8f82de76e0ab3bcdb01731a54a130eaa5824d952bb61b72f5f444431170fda77f24bf695bea41ed5eb291e08d694881051bc6f776b3b9d288f65eb6aedde681c",
    "signer": "0x2607197F4148fb3F95c8e4b03827e63b3457A751",
    "userId": "645199904"
  }
}