{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "21930",
    "entityType": "User",
    "nonce": "0x7bad8bedd7c89dd2859d9ebec6cc0cdac27dd10665449603656ab534540a25cd",
    "signature": "0x4da592f488797b575825642a4d833b49dda46f37bc91311ad734a8b521c0c34867e43eb1cf80596bb8eaf1198ff23c2f0b7e23084332b04eddaef4a3cf1cd9d21b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}