{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "620307004",
    "entityType": "User",
    "nonce": "0x785072153dc98eea3cd4c6bde6304dff700076f3c689f0a227334e75a7ac7167",
    "signature": "0x432f1e9b8c55de73609a60251ed4521701f1f8c7aa76cbca7ba49d9191d3be2775641ee2881f4ecee373b0f96211b6764c3b578c00a33a83038384971a40d96f1b",
    "signer": "0x45dAf7d8C91b01b2F5E651081b5910a6b272928D",
    "userId": "819927783"
  }
}