{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "674740",
    "entityType": "User",
    "nonce": "0x57a602d9ecf9dd6e7d88b58a652a96969434077509132043205556a75d790d5f",
    "signature": "0x990c15040dcb62df5a7df24807193d583d597573d651c9e6d56c7c037e60bc1074cb516e53a5731124361c7f4cf4ebb3746c2b720e948ae174f3a4e27c997a331b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}