{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "578849678",
    "entityType": "User",
    "nonce": "0x7f4afa9b31744f431cbf6a8837ece2d4faf33e9e6456edba2d06b38954fc4787",
    "signature": "0xa0da617a9d216881a2576c287325204a78f5459317f0797d555d84ecbb8e3e450db17c0e9dd5b284ef28e00741ca0139f892b1e43b010a82beeb409175c455e11b",
    "signer": "0x21370B7a703524cC2941323C2c960224021F8D56",
    "userId": "986168993"
  }
}