{
  "manageEntity": {
    "action": "Save",
    "entityId": "2015376390",
    "entityType": "Track",
    "nonce": "0x46c9cacb53104917eda541a842784f4d5faaf7662733be065cb01188e9ba4faf",
    "signature": "0xc6cfbe7852704b73936eceb6e07898e134b70d607538c035b5b2c782200e47132af769964f8923e27feb4de57d7ecd007e76da65ef0a6baefc63c313eb7497141c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}