{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "3400",
    "entityType": "User",
    "nonce": "0x050d2d9f5c6d16415cba7252924420640972baf6210d80384fc9b26c8ff3de67",
    "signature": "0xe31dd4648b7357bc10787afa104fbaef46daaa0de24fcebef14df90820ff692b418d5aec3d85f26f63ad19bff58e8b5f71604d12753deef56d9de2fa27385ed81b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}