{
  "manageEntity": {
    "action": "Save",
    "entityId": "431017152",
    "entityType": "Track",
    "nonce": "0x6a4c10885ee898dcc9f1adf026a4e9f74be8702c110af7742fcbe82b66204a03",
    "signature": "0x7960bc2c38d5f479d6250629447915841a7beb3c0474c646b0ace42097a40af37404211e2a725d0b566ba935163879390d66603bf03b1a2335afcfba036edd4b1b",
    "signer": "0x36d29AA5C780341f3b35bDE6c1411a7Abcf8794C",
    "userId": "571117272"
  }
}