{
  "manageEntity": {
    "action": "Save",
    "entityId": "1975758319",
    "entityType": "Track",
    "nonce": "0x6f3ebd11b7a9b9372bda897afa2d8ab79d740ebe9e41b5971661dceaff530735",
    "signature": "0xba2ad70a580107146969393c05f66ef255b008cc75a65b2161e0a19a1f089374210babe73a9983fe96c02dd634a2850a1a3786203f1d05572b6241fadc15f45f1b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}