{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xb281ea16855f581230a07654c322e8d25ab726c4bc16dc99a6bba7f039af8ba7",
    "signature": "0x9dd7efec5de45b68783f0da5ed791e5f9e5902ed73bc20b8abd3000b960d3a5d0c04406441255ee540fdefbb1dea0414bc85857e30b4171f3da2989303d68e251c",
    "signer": "0xD03e6976eD4d0102D82a2D2c5D87c67F53CF84BB",
    "userId": "74307388"
  }
}