{
  "manageEntity": {
    "action": "Save",
    "entityId": "1598582452",
    "entityType": "Track",
    "nonce": "0x3f48f248e753374188823f7c91fe51f971d33f2fcd096cb5d0966cbf1469a03d",
    "signature": "0xa05913c60925b2be35664e96340c39b2dadfdc8d7ccbbe26d96a6c27c3427cf85e64f3ffd32078070c09014518a26c1d445319c13570fce018d5eeb1d115894d1b",
    "signer": "0xD967b68365738013c9197659aAb46EB73a488080",
    "userId": "488430169"
  }
}