{
  "manageEntity": {
    "action": "Save",
    "entityId": "943382",
    "entityType": "Track",
    "nonce": "0x79c19c0bca0a52a6f58f75082dac5f0c51008b45d7eab43fd736b2b3e04eafb8",
    "signature": "0xe431b3738bc3ce131c5613a340b09f9545ae37e2e42e44e936a5aa2433c871b16e11a216b697b534179b7fe8994e3f2bae2a673f84514e37ce22bb85fca884791c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}