{
  "manageEntity": {
    "action": "Save",
    "entityId": "1544160019",
    "entityType": "Track",
    "nonce": "0x81ed6d89dff8d7404f80580f54200e7f88c66b2044f7a22d2edd89b7137aeaee",
    "signature": "0x8b169845b325684bbcfcf3b28ec2c310b5ef211f8b57b8714d8a557bf01f699337939162b51a72a04f83d93e1c92c507e237beab3dc05741996f68f36419d24a1b",
    "signer": "0x45c4f1dcE13eeF476C74C5758696D56137253980",
    "userId": "824478223"
  }
}