{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "529409199",
    "entityType": "User",
    "nonce": "0x41393ddfbb3c3592138004cffed2c171ef3dce4ffd57edd141b9c1019b2e555c",
    "signature": "0xbe17c993bfa4b2bab4cfbed76212b9c25f460793a7d7bbaeea52902d012fc0224903551e5363bf330eccdbc9190427a47073a949822b17361451511c622f7d2a1c",
    "signer": "0x16D3bf5a80bAfFB2f1550d49b1203D4CA532DA1C",
    "userId": "1994482"
  }
}