{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "777",
    "entityType": "User",
    "nonce": "0xb69c3e1ed206ca9ed0c8f8d5879dad59f690fd82b97c0d81c8a29dca6a699e58",
    "signature": "0x89210c98bb15aa56bbca7fbe7b29db11255097df0d14b564c4da5ae0373219644d7ffed68f69d521d6ed5a7738d0d5f394b8dd353dd3382dba6af4f2a8cb6a741b",
    "signer": "0x0D2c1331F52a98aF1Bd206E3C28062E717CA9E51",
    "userId": "597927803"
  }
}