{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x76fa061699044a7b70ee93abe81600e57ee84eae8bfa70269497ca4c4878d409",
    "signature": "0x1e19d73fbfdace99b6cc1b809f25d67af7552835a72559b008253af4854c928976d74002a76afde5ada873d2f646ba57640d3814f2e63cd60ee930fd720fc4951b",
    "signer": "0x930196f57Db280A5464e99A3D3de20e5547ceFdB",
    "userId": "541123324"
  }
}