{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "987199883",
    "entityType": "User",
    "nonce": "0x496d1ed4b62cd260571342df4c3ca205d54698910b8c367726d1f6a7f2157894",
    "signature": "0x42bc6366423ed622c5e7a1db803e1179037011074e31f8335c36cf04e048b63f310e0187d045b1f18c632784bdfde1cac83044ab2eed0a354ad6ca3a2cdcc2a91b",
    "signer": "0xfe6022590e48C8eA51d706EbF4eAe799214A737c",
    "userId": "900610030"
  }
}