{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "500693164",
    "entityType": "User",
    "nonce": "0x730b79aff932a408ac804a02ad400a16c6f521f1acad932cefc7186e6054c5f0",
    "signature": "0xa42315cc8404ec29e1b48da417337dcc1a5c4a82b03d87a913814e280cc2bcb10bf6b98327daa14acdb10aed96e944763a7b4f1f1bf9e7d85ae12b6ba9343db11b",
    "signer": "0xf40B9733C01391cEa83c60E54EBcAA3CEADE6019",
    "userId": "169185377"
  }
}