{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x51c7d59d3e24f3847155e048b8a25a86c9ba20dbc003e0ea7247e7ad1ee2f3a6",
    "signature": "0xddfdb53d5dc1cb68bc0fd736a13fd1f1cc8c8a635ecd319378c7f8adf795ed1a6f662c2d97894f41dead6bbaf48f13d7908976e461b5f8644b41fcf041f05dd51c",
    "signer": "0xaaDaEE16C1277E756941765BaFa8aC22C1e6dfb8",
    "userId": "747608505"
  }
}