{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "428192787",
    "entityType": "User",
    "nonce": "0xfe9a01cd22a4e2ebb83d29c93eacfb8084b777ae867e4e93bcc02843e459aec9",
    "signature": "0xe1d33332f6948c16d0850ea1e869501eaf4007acaccbdb5703b5933e97504fee625709ffdd41db9833608a50aa74016d3bf503fe698069b8991a2c7255567d391b",
    "signer": "0x257c9f4A9563d6A4a2bF3be7Da1738e167fcF295",
    "userId": "301719964"
  }
}