{
  "manageEntity": {
    "action": "Save",
    "entityId": "885426374",
    "entityType": "Track",
    "nonce": "1792346254112256513",
    "signature": "0x1a08903043e4617a2673a7c3f5def4fe650c2f1ce9a9fb545d49eaae2275b6867efac7114d845cbb3a5465149d031d974589aeb33127ea04033b8d1db9c2c0331b",
    "signer": "0x1007e09532BE90331E035838A9E2E0700bB9741a",
    "userId": "329513359"
  }
}