{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1512664",
    "entityType": "User",
    "nonce": "0xca827d6331b74130eccbbd1529f30c13f97b23a4d3dc8018be90cf831844417b",
    "signature": "0xa4b47cbad3bd2789eb4ddea5272642a1caacf997c3182ffd870949b2bdc082dd7f5edd2e37094d1e248a650a6e03c3dc8554f4d46ab8d30fbae0e3e45549a1481b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}