{
  "manageEntity": {
    "action": "Save",
    "entityId": "262115943",
    "entityType": "Track",
    "nonce": "0x41f39ba7498cc8ad042a92afe151252642d86c840603a06202cb4b4d46c5c72f",
    "signature": "0x2f6849155dac37577633e16bba737583315d0a6147945b84c35e9498c353f7f869db8e540a67498c1bd8ae9781f159654fa2736fddd71f00fe93c9bdd739a09d1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}