{
  "manageEntity": {
    "action": "Save",
    "entityId": "137460",
    "entityType": "Track",
    "nonce": "1792826462545904295",
    "signature": "0x1174c8ce3de6c9b06a84e7e76c136da9ed44c79f694eb5d137c91fbaf44c6e705bd1aa1ebcf3c5cda2997aee22cadaaf02c9783fd9cdc5ea9a2b073498acd2ab1c",
    "signer": "0xE9e5656ce6F7Fe41FDbCA982901407eB55765cD3",
    "userId": "670307808"
  }
}