{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "863737863",
    "entityType": "User",
    "nonce": "0xb49d1377b16948343f7ca98a0db666e0c4c62a69ed8138f666365011ed069005",
    "signature": "0x2163f929cdce70346ebb3f13d5768c87b9158ed8aa48c0f00de760b9d96543797dea1a4aefc0eedd997d39056d20f62ecd123bb393e6714b8f1928ce6e1486841b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}