{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "421871922",
    "entityType": "User",
    "nonce": "0x2df527a7437d33914663404212c68169fb233059a079d2506b68d2b3f4d5ce97",
    "signature": "0xf9e2023442683847d75b84d1b495e3f1dec20b9d2002fc1992be5046c103dc8b4ef24e1eb899fdbaeefbe2c5caa27971ba4e8eb0f619adae1e40af1a920424131c",
    "signer": "0x9b6bD4505e2bCfA88acc8680F463a96DAddf1d0d",
    "userId": "213208842"
  }
}