{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "620307004",
    "entityType": "User",
    "nonce": "0xf4bbad96967441ae74f231e372bfb4fbdbb95a6e3a0997e7f560602e9eb0400c",
    "signature": "0xe7e865e2082a52f1144f9dfe31ea988c22ae95cc6c735c939e21b899c16580f7272099b6151a56a729a3f9e795c0ccaef3bab5eeaa164437d9f481bd857bb1411b",
    "signer": "0xb68FB6A5ae9015De46D9634e946c04517523Fa43",
    "userId": "134619804"
  }
}