{
  "manageEntity": {
    "action": "Save",
    "entityId": "168899812",
    "entityType": "Track",
    "nonce": "1788956211758077760",
    "signature": "0xc9b56a657a3c0971d4f03a38c31f2a8cb4cb80fd3583a73ad92dfd626a518b883cc762fc28cd754ecc78380a1e0a13e4a0fade5d71aaf1b9ca968981cc5e23a01c",
    "signer": "0xd30fAF377491796757Ef4C1B0ccA8a407920e663",
    "userId": "451691735"
  }
}