{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "620307004",
    "entityType": "User",
    "nonce": "0x286aa3ac43d085ddc69d30cf3e13e4859db309cd017c3e810b35830fc64bb8ca",
    "signature": "0xa9f3774cf7152bc214edb7933026516cd5770ce784cbd3f8c0a3fb082a8eabfe159015d65ce5ceb21fcdda7c80a20da80b8396ad1dc6a94c747b8abbe1b7a64d1b",
    "signer": "0xE7A4a8f1d081B44C96Ed68610B6c3016ce8cD6E0",
    "userId": "464427506"
  }
}