{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "575845728",
    "entityType": "User",
    "nonce": "0xc4a72858e403d73b27f630bd65e8cb3e50a7edc81ca8e4d6d014ec2b5beec399",
    "signature": "0x77dda97ab00146c1e5ccf6902ee170da807dbe1e8ab0beaa54f88533e75127b32f96b770910f31cf3813cb2fbf484b95e42e5e00f9d785bdca33ecf22cb80e101c",
    "signer": "0x8B50B0687712445cB22f8e1232Be42e560bE3deb",
    "userId": "487640022"
  }
}