{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "4138",
    "entityType": "User",
    "nonce": "0x7f4c97b8048f07dcbe60ec5577daf17617a08b40490a6de0cb6408e379cfbd7d",
    "signature": "0xdfd62a0f5625cfd0702d311e393d5ce3dddfb8db5b07c40a9d1c31c92cae16444b9a4a61742fce3ef01ccb6383ccbec7c2a0478a4dfab9a476179b5c0aad7f8b1b",
    "signer": "0x40E8E224E8F8a9f835e4dc8851Da72DCEd75986F",
    "userId": "504092010"
  }
}