{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "548504312",
    "entityType": "User",
    "nonce": "0xc6ec4ac5e654062d3fb3f7661b4d3e720cdd63fb49733440dff2b86f4ab61146",
    "signature": "0xdf3771ce8e14a2a6e175364532aa8b0fd0beb18b1c06cf70b598da313690ff862de7b4d7b359ad4bdfb12c27de38127778599e4d2818ca1637a6acacb28921261c",
    "signer": "0xd489B786708CDd8661b152CFF27695dC12c8c0C9",
    "userId": "647391197"
  }
}