{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xc805f13d6544c432c5955eb4baa6a35d2167a09d9cdcabaac9d7054d0385810a",
    "signature": "0xe36946b55f6a81e4a09875a37d35cba7d7890dad9f73f9144b32ac7f4ee4d9551392dd7ac15b210a05a3d0ec47371ce7e3a5d0da30b7ee74eff3e1a9c31fb0d61c",
    "signer": "0x21A523F1287c3c66Bb357832a7d8b2b5E3773325",
    "userId": "437347485"
  }
}