{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "398277387",
    "entityType": "User",
    "nonce": "0xb42cf6211ece0b527ab901f8906bcce20f39d81e3320029f4f5e25fd9d2e8886",
    "signature": "0x1acc07a8f3ef4834ea4ed012d9a4bc0f4dd49d90e405dd03194157029e08236c662db6ae0f8aa79c8902c690ea1d49ce921b9ecebf30d3ab5f9e744331f288841b",
    "signer": "0x16e1A840950aa44eF9AB748462Aa51EA80bb91AF",
    "userId": "375137667"
  }
}