{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "348198680",
    "entityType": "User",
    "nonce": "0x02e6bf4dd908a5544c16dad13ebbd773788af0337346764e757469d3c94849b6",
    "signature": "0xae0ed9c9ca8684708ebdbf6d7bbd82f35e6e70d9b0d03a0314232ad6222357210159623a4135c6d4ff5fa694ab85cfabf71c11fc98af7fc2f2c43e9b97aa2ed71b",
    "signer": "0x2D566E1DaC6fc148a694abe846B32e39B6584aa5",
    "userId": "890889753"
  }
}