{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "505572751",
    "entityType": "User",
    "nonce": "0x88530f387a228578bda2d84b495d3950482b9e0d6c2b45a0aa776462a5f1b0ac",
    "signature": "0x695c3028b5e9b964c5ece2bbaa01a70ef109c6810d434babe636d245649ba410758697cf1d1b4f34238bf8db56af7be8dec988f629dbbb68cdb40ae1f68aa2761c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}