{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "304857543",
    "entityType": "User",
    "nonce": "0xef1fe959cd2c65b4a30507d5c35470a7dc765b770432819e8077251f85b2cbf9",
    "signature": "0xbc72f9893245e56caf6631f5568620c8821d9d75f8c5c3a37a725dd545cd6fe3590f6fc554b314dfb33d9f5a2b050018966d49016369b5528e4490e27a558cd41b",
    "signer": "0xe23f94433EED8958AAF9868141BA976B8fffb969",
    "userId": "307915745"
  }
}