{
  "manageEntity": {
    "action": "Save",
    "entityId": "1807009945",
    "entityType": "Track",
    "nonce": "0x4fedf4f4b6e76ad6fd776a48d059b784476a34161e0f1e1c2882163d95c0b452",
    "signature": "0x47cbed3895d3200178f1a4bf329af1df16949b9a24a59ae48ec59a2bfb39d3e62e5c60ca4f2d73102badadfb2445989ed2097b8dae911020f7578851533085b91c",
    "signer": "0xa4A8a4853051b18e0f0f777693Ce34CF4bCe9385",
    "userId": "634886384"
  }
}