{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "423",
    "entityType": "User",
    "nonce": "0x9884abc63ef79e59727424c6100554966c32d454613eec1a8f8b827c107c4424",
    "signature": "0x3f4a85878a0985d7d3f1f17c46eb94c3063df2ddb277e9dc50b8f9b2668179b964dae77251f04512adbe48ff514111e0603e340e154496dba6afdd63440de8441c",
    "signer": "0x45c4f1dcE13eeF476C74C5758696D56137253980",
    "userId": "824478223"
  }
}