{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x536e937bef829135aee19d58342aedd0ff2c425cfae72feb1c4871a3e4cbdb50",
    "signature": "0x0011626ca7065427fcc262c8ac6d4f9624f6dbf5c177113de2f39e55fe22606743e40dd639b5b0741875a38d7d20cf88f433784dbcd1f0ab4222d8566691668a1c",
    "signer": "0xf873847Ae201f1bB538C23706D84cb28d5ec8B89",
    "userId": "230468738"
  }
}