{
  "manageEntity": {
    "action": "Save",
    "entityId": "1675070469",
    "entityType": "Track",
    "nonce": "0x8dcf281dd4492809be2c548615de28754f421ccd4b7ba0098cc348f80119340d",
    "signature": "0x037ddc7a1710f13087c0315ab57212718a73ddb465ddde9f0099f95ca0819c5a70e530ef5dd5f680a089a65298051006269fd38166ab056e63dd343b243b2b701c",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}