{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "839739705",
    "entityType": "User",
    "nonce": "0x9aa94ea1be9d1f5564884147efdbf58a323c00d7218b6bb21e029dc7ba72718f",
    "signature": "0x9513301cbffb70867e211b66f17178b37dab9421fa42028044144bee780873d07a38b5eb6fe5e7b2e21222f8822156fddbef5cfdb47840156ad45a31bf0f7ce41b",
    "signer": "0x408CbFDbc09C9aFB99Da5f010D04f50A190b83B6",
    "userId": "675830993"
  }
}