{
  "manageEntity": {
    "action": "Save",
    "entityId": "2142954594",
    "entityType": "Track",
    "nonce": "1790020835410006908",
    "signature": "0x1f55625a21b0f814c76ed745aae169bf8e98a082a3ad61d95203f86b5a43ab8715bd8a0cbf28154b97a1ed08b4f02d9ae3350c2e6e217033bcd48cc428765e8b1c",
    "signer": "0x1007e09532BE90331E035838A9E2E0700bB9741a",
    "userId": "329513359"
  }
}