{
  "manageEntity": {
    "action": "Save",
    "entityId": "1708326343",
    "entityType": "Track",
    "nonce": "1793149027371207402",
    "signature": "0xc1e83b11c99fe8d8cd390e73edd8a49f1d1442fe628d0ce3c51bdf67cd47a9a749631638ae0c125d05f21fa1c49d1ab5fe0a1513c731de55d054fc1e0b2d05c61c",
    "signer": "0x1007e09532BE90331E035838A9E2E0700bB9741a",
    "userId": "329513359"
  }
}