{
  "manageEntity": {
    "action": "Save",
    "entityId": "885426374",
    "entityType": "Track",
    "nonce": "0xf23289c5ffeebe05439857f656b0551abddb35564247f01e66ee33e2114d1587",
    "signature": "0x0efce2048eefd032dc00fead1930609c75032fe9ae80451db840b2ac80110c6749092a7fdfb71ad965aef3635d59d0b385227db7b9656737a8daea9e78a8fffa1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}