{
  "manageEntity": {
    "action": "Save",
    "entityId": "196484871",
    "entityType": "Track",
    "nonce": "0x910aa4318ce99bc5ebf88c35fd92bfd93485150a9990ce89beee9f5c7d7e799c",
    "signature": "0x532fb598f48a22f7b97d076f16fc8a3edc8ebcabbfcbf3f5665e6ffbef7b2d902cad06ee3d215889ef6bc299e18fd52274c2cafb8f6b52e672fb9209598ff4881b",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}