{
  "manageEntity": {
    "action": "Save",
    "entityId": "593523404",
    "entityType": "Track",
    "nonce": "0x5a4626074b9a3269198743c43b1ff245d9c655b099fb585dd171843637e45baa",
    "signature": "0x4911c2ac68886c21bfa82b61c3d4eec64fec4ccce8e644a31a29b76cd8b9ee2e691165d9ad9aff3fb1a5acdd9686a8b544649cdb25564b58fb824e35902c46411c",
    "signer": "0x7b52e6AA15Db4Fc3A84AFF2b12e5B8B128eA8610",
    "userId": "808512351"
  }
}