{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "203774",
    "entityType": "User",
    "nonce": "0x1601cb5d0335b355f7bf73077da4b4ee351e3f790e34e4a7d26b789943a40bd8",
    "signature": "0xf03afd663d8f53e4af9e8630925069834d677ce3855eae6cc0da879c262305d368ba10eb39db4f19faff24eeb085a54fd76654089eaa4c6388a861e758af37631c",
    "signer": "0x4950A7c498b6c214e83B79502162b7f248f9e6ed",
    "userId": "499895630"
  }
}