{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "6409",
    "entityType": "User",
    "nonce": "0x5483b239238730b291d440b36c7f8f0266761cf14f3111c9d713de24a96c170b",
    "signature": "0xc481fdf7e5f6c032d32cc6f7d458953abcceccc6ae292d7e1e4f6cf4282041627cf8e9297ad97f0c0de9453affb0a97035b830ea4697488ac36fd20a156f93ff1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}