{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "190321",
    "entityType": "User",
    "nonce": "0x08c5fb97b9004947a12b295ba61adc8e10d50b820871f4ceb74acbc6d9aaaaae",
    "signature": "0x4f7d132ac09b3dd08e949dc04bc03db311478985455ac12bf6718b327df0114610d021dfb73cece65ee9e0957044cca09fa5d7afb003b1d4b885378680aca2c71b",
    "signer": "0xa4A8a4853051b18e0f0f777693Ce34CF4bCe9385",
    "userId": "634886384"
  }
}