{
  "manageEntity": {
    "action": "Save",
    "entityId": "142403",
    "entityType": "Track",
    "nonce": "0xdf046e1a83e4fe666b2860038fc8bca0e417e4310ee2a8c0011ec03f217629e3",
    "signature": "0x5d15a5aafc5e9a35d177aa505fc008a6ef1570df6948c9d30a4297a165be42a27cd00851f0cc45bdaec1c86a2d6646d616097da626c8d0bf65f69600edc51fc31c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}