{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "719754",
    "entityType": "User",
    "nonce": "0xb500cda8fd0dc5fa11aff0483e73f1ca15835236a4925a9b3baa981d619129bb",
    "signature": "0xdecf523a604b4d9e3ac29198692dc595dafed0e73e4742f1011e7cd1d589a6595ffc4bb86a3ce60b416a538c2b2811586f73a32feb930b66999be84867a8daee1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}