{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "203043806",
    "entityType": "User",
    "nonce": "0x1937651d02e5ce73e2d296efaf2890cb39469537f021b7001f212cdbd1a0377f",
    "signature": "0xce412eb7a079dbd4048f546d92f65bca206e95afe505de6a51255bb48894a1961f38d813cd834704394c2caf46374a0b20d9d781e4c229054ebfaa32e159eeda1c",
    "signer": "0x408CbFDbc09C9aFB99Da5f010D04f50A190b83B6",
    "userId": "675830993"
  }
}