{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x81a7ecfe9e86e7ea613d826ea8a11cf33bb4efed8ad9af2301d18166820e6b5d",
    "signature": "0x6dc65e8422e1edbe08e17b80b60aa32962977e9dd7393f7d5e4df44593e8a83d7b589ed81ab12070e4b1fe7f7a54872547203efa78f37efc8c4324416c60294c1b",
    "signer": "0xD99A5A77c7F24A417BcE29efBBE3096997c07e29",
    "userId": "789245703"
  }
}