{
  "manageEntity": {
    "action": "Save",
    "entityId": "1045835",
    "entityType": "Track",
    "nonce": "0xc9aed0a809a8a325c1612fec278459c674abf2ce5de42ef92d377414e14142a9",
    "signature": "0xc373149b97b2b8ebbd88c012a9963a407b7e18503baee4fc80312bacf79897e565bc7f4419e6e92e7b2eed58a6165cea7247a94ddd39832cf5ffe4ba83d9e3a41c",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}