{
  "manageEntity": {
    "action": "Save",
    "entityId": "700628944",
    "entityType": "Track",
    "nonce": "1793267035146985770",
    "signature": "0x2cd55cc2959f2949314462b50d792f5ec8b64208faa61ba35f494071b37453eb7548ae6b1307f866da8369ed03733f31c80493d38facc4a024dc0a190abac31c1b",
    "signer": "0xE9e5656ce6F7Fe41FDbCA982901407eB55765cD3",
    "userId": "670307808"
  }
}