{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "73877",
    "entityType": "User",
    "nonce": "0x292c5405c73ded12582ebc233c4dfd190faef94f3597eab92f0807740c0a4773",
    "signature": "0x9192cdc00767dc922d88a4209f95e96db5059b8cbd8e5b7f422f271b01eda68b6f592f89a45d21d7635201abee42ebb1a193aa074c43464ad2f3ecd6e29529031b",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}