{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xb945b3a55d1e0ebda1d8ae442146c1113f31f020c140d68f61b867f84404e8f1",
    "signature": "0x9ba5f7b51271ee6c099873d3d2c3d24207def64b2387bd4b823775bdb2d5e90c73e3a2c8d3c0bb964be754b6c64241db9914c7094b19587a744f80f4c8e6cd3e1b",
    "signer": "0x90A9206Df4cA22A1ad24bfB7F1b639Aaa812Ac58",
    "userId": "266782887"
  }
}