{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "542421603",
    "entityType": "User",
    "nonce": "0x35791ae30eb23bb917d04f5909c668080a83e2d6481aa8ceac201ae1a0b94810",
    "signature": "0xef3038f0f0a7eb579017b9fa5d5a3583c67bf5669fc33670ce70d2efd9bc5cff60f1c3c3855a97a790a5b451ebaa99df119ca465c4c2b57e451537a5195f88851b",
    "signer": "0xC965eCf215DC75172bD11e8E1dbE76EDd838886e",
    "userId": "260849"
  }
}