{
  "manageEntity": {
    "action": "Save",
    "entityId": "2035538177",
    "entityType": "Track",
    "nonce": "0x109814fde76c7c7276c9575ab22382967ac3da7d6b0a8c3c67fc5e3514af24e7",
    "signature": "0x726f2487ec6d78d1a215e3ebcfe75b2f73f688130cd8fa705d2faefccf892972638d364a26a3a3af2cefddbf035ba08bcf458f8bf03bf09c0f36253abd038d291c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}