{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "400171089",
    "entityType": "User",
    "nonce": "0x7812e4620b978932dfc22fded70f81337bf76aa7328a5efec1e9c32a9c4e88ac",
    "signature": "0x04e99b83dadf8431a59f8eeaaf476555687b8a7c8c446fde4222711bc58a7f10358407a9d85ba891d2d01c2b12deb9ccafc6df2d28c57589c14b54e960ebb8971c",
    "signer": "0xb4A0d67357A27C413B5930Adb975d62fF238D5Fc",
    "userId": "8989850"
  }
}