{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "664900058",
    "entityType": "User",
    "nonce": "0xc76a64ed5d06e4c10d05f0af8b82f998b85db6539c6e88aaaec606d352d6cc51",
    "signature": "0xfb3b512b25a60d88dcbcc46565dd11f4093a88c341c97f737c7843444e384dda411a39e09d4b5747f6f9a4e9093d20272a88a4ac56584904d657418a4da0cd151b",
    "signer": "0x8d9D00A94c3B1C9992e3CA4386AbBC6345B2E876",
    "userId": "396658415"
  }
}