{
  "manageEntity": {
    "action": "Save",
    "entityId": "100964",
    "entityType": "Track",
    "nonce": "0x21f2f32caa154f64ac04b2b65a1c57dc7afb72621dbf1b83d1e9b0e62fa8b08e",
    "signature": "0xa94f2d26a5e6689fa8c485b0e726062e6e02194068249a246cd1f71e52583918343ee217fb1a254e321ad38dfb84b2f11ba79459d26152af49173fafe42681d71b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}