{
  "manageEntity": {
    "action": "Save",
    "entityId": "1699504794",
    "entityType": "Track",
    "nonce": "0x5f07b302630e282c39089a10b5e114414de4497db4768ba88ad5870343e3dcb3",
    "signature": "0xd422fce4c5a5f1944e4e0422c8d0b82cb8049336f08c0b87913f2fa7d41efcd71ae610cd8206e0ec7ad2d606532d6384525742c42bf742f79d0c40f76b5a5d891b",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}