{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "190321",
    "entityType": "User",
    "nonce": "0xbdc4d417134fdc4828d6f75b173b69385ca50c6f2eecf2c8c5b25a142d70ec4c",
    "signature": "0x75f35e5adf1b494541cd8e11e0d4b1d6973b7979dce1f463457b6085eb595e261ddfb3691aaf849adba8d32eaf295eebf0c17f1d09e657f313f0bb1a8caa42231c",
    "signer": "0x41b85819b94cd5b7fECa7e7BF3613e0aEa1CD2B8",
    "userId": "190643626"
  }
}