{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "943748539",
    "entityType": "User",
    "nonce": "0x50a59e1b2e0f7db0a95d0f6adcc990cf0076266979618803ff014a9687813246",
    "signature": "0x1602992a9a039462fc20326cf31f3dbd1f51b391a91bf36585e8deefebeb0aab4c117bd5fcfedade43d959ed5f20988aa66f1d94f1b091b1bda385f30b1127d51b",
    "signer": "0x53f39D73a2dd51E9e8A362EF3b1383072E37cf26",
    "userId": "74209883"
  }
}