{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "299555",
    "entityType": "User",
    "nonce": "0x856cf938ab03cbca5999a537a7f973afcd22dd34f2e815417ff4b0c1883cc04b",
    "signature": "0x3930c7513156884c4266e779fff5d81fa918c6cb7a16b647148a7e475861531423923c13fd80dac714b4a7796c5e1671db41381f8b4675a036e145e8c4cdcf641c",
    "signer": "0x55F8937EF7902E83b15F5BB7c7bf72a0a2989C54",
    "userId": "233666542"
  }
}