{
  "manageEntity": {
    "action": "Save",
    "entityId": "1114889",
    "entityType": "Track",
    "nonce": "0x3819aa240abd30b38e6e5177ab6709b74e063f141771b264e9f502a99778056e",
    "signature": "0x4497c3b2de43b009cd4f8cef7b4af3139eebfbfc11c688c2ff34e2dc5714c8f71ee74c9b28d5c397aeaafe787aa0982f18c8b088a67381afb66afb299f7aeeb21b",
    "signer": "0xF853B69926C63C459c06feF86A641F3b770aAa4E",
    "userId": "579563947"
  }
}