{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "16564",
    "entityType": "User",
    "nonce": "0xfa3dd3d032932f305982827f09d840004bd834b171f26c3e6d1e57cf6acc432d",
    "signature": "0xfa60ad876e71e3866bd6ecf13ee9124c374dc2f1d3a28abe8bb7d57e718d112f1577c087f12eed8d279ab3f8fda00597d0e9e38abf9eb9d387ea76021ecb917c1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}