{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "580720856",
    "entityType": "User",
    "nonce": "0x68b88d45468179e5c6ea52852b8f936ebba7afbedb66cb203caceeb16db11e36",
    "signature": "0x4b3729da7a1053d167c15478307b75765f1de728391185c195d8c9a98ffca08a67b8d97f649b0fab5499a9472499e398efe5bd407e5d36697d2307f4d58dbd801b",
    "signer": "0x21370B7a703524cC2941323C2c960224021F8D56",
    "userId": "986168993"
  }
}