{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "575845728",
    "entityType": "User",
    "nonce": "0xd0944a92467195c8fc3b4ef7224bc99df047d1086f688c8a3f432cddc558e9b8",
    "signature": "0xea5bc8f67565260d05163a4670689dacc08ce065d9bc8acf87724bd5e190932304e8a2f63481489d2f7cc8c56647bb6b4d578439e2127ee68354fdb83af4d8ea1b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}