{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "507325",
    "entityType": "User",
    "nonce": "0x5c71f50a51855092bc9366a731afc86c022f11815f9928406140c8ce793efea2",
    "signature": "0xb33f9da5d183b7e8060e397373e61c2278730358c586027e35ee2b1689b950543a87899d4cfefaf3ca294545ba4eb49e71dedf565d25ff2f4f4b67eade6d47a81b",
    "signer": "0xe80840F82266A0Bfbea798e325eB9Ee52c5C78AF",
    "userId": "637284137"
  }
}