{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "143388",
    "entityType": "User",
    "nonce": "0xb0a7658599a1c7d2f0dbd1993df6c9e9577bdb9076d0a98039b911dcfd0d895a",
    "signature": "0x3016ffc1b2014bf4fad748787560a725caadd4604f0607333237bb33a4bf873c32b89a85b102c049ada1219dc2e9c82f767add5cd5fecd7be41237ad863079f31c",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}