{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x29f1f127d7120c8c8814ae8ec25f0c71dec82a6d65e128dfd356a7bd3f420c8c",
    "signature": "0x6ecc1eb12b723d0c84e8a1440916a489d4f98da04a224c8cb1217e24e876faee61015e5f7c2d90a9cd219375a7ca53a9ce252c473fb72cad6179bd2d03bb9d231c",
    "signer": "0x721f076D6fdC57634d612324093cA69B47866867",
    "userId": "303348966"
  }
}