{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "2005440",
    "entityType": "User",
    "nonce": "0xb50c993a80bfa90e87f60194f0634da21f1c69e330db6cd754a72b81534ff51b",
    "signature": "0xd789e20d1778e00f825c2b05a78736bebc381ae1a9c851ad68c475e931e213747bdb6d4bdaccf7a51f8bb65e364893bf1ac10e50278a2da06923a773579ed9db1c",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}