{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1",
    "entityType": "User",
    "nonce": "0x40410d8e3ae184cb0fad8bb7a46a4112c36343cfc6d3a20f633fbc1c66450b1c",
    "signature": "0x473a9f2d5a1853a834490c0bc79577ddf8910bc6dc3441d077087bcbedfe7df87bef83dc0e24d5bcb8a69d84c8ecfc1258fd44f446ad4084a1c38c907e3dd7f71b",
    "signer": "0x75a075dd45bE38AA2c27754D97d5d84dD624FeA5",
    "userId": "451351"
  }
}