{
  "manageEntity": {
    "action": "Save",
    "entityId": "1936048047",
    "entityType": "Track",
    "nonce": "0xf405318276f8aa73bc80be9cb936330311364efe798dd07d3360c858fc03b895",
    "signature": "0x85c43c3d2024720dba0c17d065d1b3e58255bfc36602545f909f158232d8f2976c08174b973458d81ab0fffb21d9169fe8fcafa4d82e013fa163acdf794e6b271b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}