{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "121458",
    "entityType": "User",
    "nonce": "0x60cba20f37ed61c7818c7e4c0e5c718ab9385ac70659a8513acfa3e466be870c",
    "signature": "0x5ce54e5c4b09853f58639848c42877c47cc40671aff8876f6a6fa3c1fe9b28945943baf2c52da5f05bced41dfb25439129ce1ad939ad4e97659419e52767eda41c",
    "signer": "0x294F540CE80e30CBc9Fb7bEA94F956ABdEcdEf68",
    "userId": "809640913"
  }
}