{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "345811967",
    "entityType": "User",
    "nonce": "0xff30a0f4746535de10a5fdfed1ad816449b4c8808491b1241dfa5324045d934e",
    "signature": "0xa3bb0d89b637b8e6477c9bd412566d5ef261ac100afd0bd49af04f562fbafb417002816bd898b81977ab4ed70bdca95d2e3412132dcb17d0269cac437235d7721c",
    "signer": "0x90FD14E5f569756111EE3AECbcE1AAb95c2A01da",
    "userId": "86867162"
  }
}