{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "319583",
    "entityType": "User",
    "nonce": "0xe7b0c678bb3199fb4fbb55ee2f0a187a5e833f862e534c00e466d81be18ace81",
    "signature": "0xe6fe5db935dd9582ce6701d50a8173417d86e4ebe7bd4f5fd085968844451cbe37978e0be850eee76caf0d1ede0da95e48d807c8e067f5a69dced366eaad7f051c",
    "signer": "0x408CbFDbc09C9aFB99Da5f010D04f50A190b83B6",
    "userId": "675830993"
  }
}