{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "661101608",
    "entityType": "User",
    "nonce": "0xa660a429e94997778b19d9ae7cfd0c1561117db4f765b19a904404157737ada5",
    "signature": "0x5bedd105d9b82ae0d4fa431326a3407cb1e436add2989b6b16fb3d24f9b89a181c8cba87ecfe06740dd35f3ec393dbedc0f14818625c978c84d7757af7b30ac11c",
    "signer": "0x57D64A47c0B6C0789D9565B3D90270Aea276eB11",
    "userId": "199258"
  }
}