{
  "manageEntity": {
    "action": "Save",
    "entityId": "528607529",
    "entityType": "Track",
    "nonce": "0xace2e0c302d90dbb84f6db74091bb9025932d2f36c9587ff2c75b9df4e3798d9",
    "signature": "0xc47d64f11bb22de543ecad66687adb4940f1c1c8489820898655f63ad4374d0036fe2af17abdae9acb048c6dc1f0de511f69a0448e12bc2d3ba906360be8a5ac1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}