{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "399822794",
    "entityType": "User",
    "nonce": "0x3a8bdc94ec218b1f51cf0195bdc78959231f95a90fba043eab8bcb312cf4cc8b",
    "signature": "0xa14c29558677533c3100f2493e1db059a9db09facfe8d2dfbcb7bbfd52dac1ab2a4da4bd23cd9b64acd537cefbeee5a9d1ceb3a7117f80f8cbecc7ab057428aa1c",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}