{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "594768223",
    "entityType": "User",
    "nonce": "0x603f8c96423fcaeeeac5e3d0efe1c6377451bb3bf85bc32826156e841c1f9ba7",
    "signature": "0xf80f405b731e612dbe7013af95b980407c2e8f8c31667df94d4952cea16151b63f5e836a240e42b95230805b741c7599065bd990923e7e423208523e65172bdb1c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}