{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x304003e0503c3ad496a4e85d70beedf7f7c04f1ead5089e1890b393b240cbabf",
    "signature": "0xa56690a7c5d4f5647a1f1547a6b5648f1f265f1295996f3c45411d523f0addce146d992eae69435fa14abfc69620d92c7e949203bc9a4933876f6944c8e9bf2a1b",
    "signer": "0x600ab5340CbcEdF27914F7784164758a7e1eaBF0",
    "userId": "307479286"
  }
}