{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "53389",
    "entityType": "User",
    "nonce": "0x8c3c6ac9eb43abe5407e84de161f7fc6cf79e5e8f28964c801dcd03a9924d575",
    "signature": "0x548d1e5802d6e824c3a9f5e74f4d09dca6c05a12f0b22f60b4550d48eccfcb980f89b2a40164de15b12c96778ccba17f20d9cd678ea2fad847e8c6021cfd144f1b",
    "signer": "0x040629E31a68119093b9a0111257C8449c2f8e10",
    "userId": "20"
  }
}