{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "743456",
    "entityType": "User",
    "nonce": "0xb8aa495b83330907f9ef142c9637cc030e58282445ba7aae957fc0b804e740bf",
    "signature": "0xae935343c23e4f462a26ab41eb31c17aae1dbc7abc7e15cc54d04304ff114a170a2b1c43a2dc9690ae5716ddec84b238a4f2f8d0d02dde521644a1241dadf0b01b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}