{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "378599804",
    "entityType": "User",
    "nonce": "0xecba2bd69b29b2fd164c9c69f5a3adb4a96a266503b43d86e4474fe830148097",
    "signature": "0x498622a9b2409e8ff8388fea25ebbc89c748a3ca0d3f64285322f99e9f5f43662d8e92e8328c066ebc88a5b3e86f9d49cdbfbbfb898a1b41285e252c54b8ca031b",
    "signer": "0x9149C438b2FBf68d0e846EEfE2E6B19be686Af42",
    "userId": "843"
  }
}