{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "7504",
    "entityType": "User",
    "nonce": "0x345abc1ef6865dbdc2e43e997789d8fd908f6a5b856942e65a96a456ce03a4c9",
    "signature": "0xc536a7a9053ed84723054281c48c6db86cb84cd667c73f8b166c3414c1335fdd1b21b110422cd0c4d6c0ec28e7dc9ce6558c9a504d8049e8ea712e55c1c8000a1b",
    "signer": "0xC2A9E3b7F06e60ef97DFB73522582B613021cf7A",
    "userId": "265825696"
  }
}