{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "638733607",
    "entityType": "User",
    "nonce": "0xb214a7ce001e752fa210eba4634ee1bf4c285a68577afccedae39eb028d39aa3",
    "signature": "0x32a2ad3e294a1ac2af50a1d7f306482c0b90dab4b58a1610e917a917942b96c07d32c42330ceac74dc00af1d437fa73c874879e8be87c514a5923083dbd9bbf11c",
    "signer": "0x0D600BCb2801b314014bB4C7Ef793adD38E375C8",
    "userId": "916206761"
  }
}