{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "309421",
    "entityType": "User",
    "nonce": "0xf08cfb96ad82818a52b08f78450a325d54859725dc469c28bdb17f41f3249eb6",
    "signature": "0x36c94f1619397e8e6181254dd3e2abf1b83268ef73af820d405671f1513e716523b9449b0b584ac710d30ed6407aa9913be2eb091dab02ba9af7e785033a28ef1b",
    "signer": "0x204E506f1D5498d2CABD41d2fc7a3078d5792835",
    "userId": "768479471"
  }
}