{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "3407",
    "entityType": "User",
    "nonce": "0x44a3e6e6af3c5203486c051db17a8498dcd05751491d160f14660b7ef06bb59c",
    "signature": "0xae8ad99e26adaa5b868039cea83232738903abe6b8936b18c803977740bc887b1233080016add6e1f6088a4d994f15c8ec698f9d9dadca3a970cdd07098da9a81c",
    "signer": "0xdd9866f5231155D8450f557CF6216590fAeE2900",
    "userId": "697765896"
  }
}