{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "665",
    "entityType": "User",
    "nonce": "0x49fc10118bc127922fe6827354d3dfe63d23bed10a45bc5c9474b71fb4c69e6e",
    "signature": "0x03b2ea6fa81bd04cbed753744c1f38f2ebac97fd3b9b6269dc5b5b095a00a662162bdb9ccf6b99d552ba504fb3a9c195904c54aea360fb1b07d9482128f942441b",
    "signer": "0x52F331C086a11941E738a6C86d9F127E934dDEB1",
    "userId": "281470566"
  }
}