{
  "manageEntity": {
    "action": "Save",
    "entityId": "1037763672",
    "entityType": "Track",
    "nonce": "0xd7da12612a93fd35feccc5c9364c2fce08b11de023c305090237e71530a311d1",
    "signature": "0xd05f6926d39902d62c9c6d9feb33b75c5277ba1adf91ded0b285a0d4e9a1217c2a877a48c5d888f82c7f26349356ff76b99e874d3ff5d65df1bd3ce9a61c87131c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}