{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "143381",
    "entityType": "User",
    "nonce": "0x421bd153b27c01ca49a109d36bb2d52631a66697508d6f6c2967d9de63705a81",
    "signature": "0x627d67be27e00e40ef1c552667bb4130a72e27cdada2ab066df0c87391e9ff2f08d7f3f7ed58ea3f03b14c205281307ea29e09a4d2a5d0d56d7f569016fa81861b",
    "signer": "0x45c4f1dcE13eeF476C74C5758696D56137253980",
    "userId": "824478223"
  }
}