{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x35bb12b954ac8bde06761961feb977ed6bfb06c00b8aef276af190bb092f470e",
    "signature": "0xa250d4d9fcb8c25eb23aa5103d5f685b89bdfe88c33421f426604ba6a8bf13562e6a0c07be4d227f08aa1f3c7714d9ac654ca4c7c0564bfd19f0f1758322e5311b",
    "signer": "0xdd9866f5231155D8450f557CF6216590fAeE2900",
    "userId": "697765896"
  }
}