{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "672",
    "entityType": "User",
    "nonce": "0x0a57408ab4d851d5166776b387e7b090b213d40e8cbc01a799634271936d3ef9",
    "signature": "0x6db315fd17e0d554efaac6225b955871a399312e84cc52c7b0e561bb980b0ca11567235a011f73ed5294744319f813f890d1f3fc1a0053cc4f0044ea44b497d91b",
    "signer": "0x9837C03EAdfA74365Cdf4e01e6840D356104bFab",
    "userId": "911622928"
  }
}