{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x406807071806e654079ed1fb2957a7a837b2f2c93496b3a03816fc03bbfa7297",
    "signature": "0x885fd6c9b20378cc88c08d976eb6b86da9c1078fc3f5908e3c540bbe2bc883b4543ccb818f071f822b998944f8131f70e97547e51ed69e3b86c2dfed2e5505d01c",
    "signer": "0x755A40a2C84a58DE10409331A5FC677b9596d249",
    "userId": "887603006"
  }
}