{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x6a139677e07f9d97948f944e085bb7013ef4cee68f1d77e0a8ea41b3ff7d7e60",
    "signature": "0x377f76704864ce7ec7e1697a489db7738048e417e45e17a7462705029f42eea456c2b501563761d4915bf2802791993139b5cc4fcc5914023b221be3618fedcd1c",
    "signer": "0x610201616178A6B5ca0590412D42C9165051f194",
    "userId": "200017088"
  }
}