{
  "manageEntity": {
    "action": "Save",
    "entityId": "540580",
    "entityType": "Track",
    "nonce": "0x056b02a091415d360e7f440893db52f0491f692e8b83ee3727665b82de64e63d",
    "signature": "0xd5e8c7a14f94ad5d564366a51faad4f8c9774d7f1f6b73084e98fd090d25e01d1f4f8c4df6019d78c9c344218a9fce790389fc511db316a831381dd2bd7194441c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}