{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "647495550",
    "entityType": "User",
    "nonce": "0x24bd501febb3db36b8e29d14bad199492e1cbb195dcc3725d4b6099264a22572",
    "signature": "0x209c5bdcdde62e6f3d16033fdbd1bde8be7b6e9839cb84f8483e28dd8d97b175589e5465480f8ee445b75280f7cf7c9bb9334f7918307c7fd84babc8a26dc6ef1c",
    "signer": "0x6eF66a6206A4589bEd5849d15Bc2746C2603b01f",
    "userId": "989336341"
  }
}