{
  "manageEntity": {
    "action": "Save",
    "entityId": "1555618926",
    "entityType": "Track",
    "nonce": "1791248293193760421",
    "signature": "0xe8c47b3f48e6a1c153fa3b14f7143515e7931154920c3940fc90aaa933fb430a10fdc9f6c6792afd374572148947d243c688fe54210bcaecb47457e5eba62e381c",
    "signer": "0x1007e09532BE90331E035838A9E2E0700bB9741a",
    "userId": "329513359"
  }
}