{
  "manageEntity": {
    "action": "Save",
    "entityId": "48145112",
    "entityType": "Track",
    "nonce": "1792393761347875923",
    "signature": "0x487bf6f92199f4ca5e84d3873d7c8dc613ab81d0b75018b2fa5cddf01b037f914b3a705e0b73f5d469d2d142b5d2920a3e6dd093dfd328eecfb59390e896aa751c",
    "signer": "0xE9e5656ce6F7Fe41FDbCA982901407eB55765cD3",
    "userId": "670307808"
  }
}