{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "224528",
    "entityType": "User",
    "nonce": "0x74adbcd0b44612e0d84e6e2ff3a0020472940d3ff388688435c7f8613feff071",
    "signature": "0xe90c08cebe21499b7295dbee460f42000a0de653db05053922c490eec007d8095d99861722e8b7494693eb5d266b6445e518d906b582e3616f017673638b9fdd1c",
    "signer": "0x90A9ad55aae6A3ac7D73EB5114a90ac9AEB777F7",
    "userId": "815799751"
  }
}