{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "121458",
    "entityType": "User",
    "nonce": "0x04476c4aa4b9d4f682b305acfc06fa7d8bfca9f3e32ef6e9a638ccb224d2936d",
    "signature": "0x90c5603215ba0de1f9e0d92a7f300e67c5b9837ffe24c7a168cee3ff0461015241bf86cfd890192fc822ac872c237bf264560d8ae6f5b70fe5abbcb62088f6f61c",
    "signer": "0x722D6B7c7a559DfaFC028Ca5c229665e81ee0f50",
    "userId": "279352440"
  }
}