{
  "manageEntity": {
    "action": "Save",
    "entityId": "233143",
    "entityType": "Track",
    "nonce": "0xf61e992df84620d2e6e1cfdbdb52e30f2f476fa08552da0d506ec79cbca05342",
    "signature": "0x518d08564746a4e175c7702c960fd422ee8bfe01ac3f7e26443965f91028237f554dff5bac0050a9397de3869ece1069cb59d8d704a6341cb1f87f6afeacbaaf1b",
    "signer": "0xcF1BC458908F84936B19Ca8Cf67C751CD647B02b",
    "userId": "310796"
  }
}