{
  "manageEntity": {
    "action": "Save",
    "entityId": "766517",
    "entityType": "Track",
    "nonce": "0x96812502eed3361168300396e92917ddf3b3657c278d814b25624f9ed57f6d15",
    "signature": "0x0b780b15cd27dc167393b33caff5bebc55bbcbf2b4bd5ff871b9c2c93de89ceb72744c5d3623276b2375b7f56ca19ee4dc4e977a70550d84f45dc0c75902f0f51c",
    "signer": "0x742Fff9be20F80Ce7285c8Ab12B9018Ef3Cf14F0",
    "userId": "111467392"
  }
}