{
  "manageEntity": {
    "action": "Save",
    "entityId": "84321214",
    "entityType": "Track",
    "nonce": "0xd1057e7c72d19fdeed5af3c25f419f8e5d157b508bb4ae38bbcfff1fed07eaa5",
    "signature": "0xa038178d58e53c2b3c2942786ebd6072fd4cc6f7fa2c826074aa4408d1d444b214083c42d891a4e7dbbc71a3ef0f2091fa7d8eed24349e19fa889f7eb9a419d81b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}