{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "699855727",
    "entityType": "User",
    "nonce": "0x51a12e000c6c05ba6eebda7ccbe4d90178b55e593511050dc041421443652fbd",
    "signature": "0x7e4869fd7b7e053b438771cbf08864e062d5a54b0b235bb4b37baec2d1bd84ca2fbbcae20f9cbbc87a8329150a03f1335bbd20fcb32db011633e905e8d2949f01b",
    "signer": "0xb7C7a8D9d12EBd1Cd438cB065E97280E6D7e912A",
    "userId": "984691913"
  }
}