{
  "manageEntity": {
    "action": "Save",
    "entityId": "1023600612",
    "entityType": "Track",
    "nonce": "0x86fe48fe1c130e22becdedfadb4905999dbbe15db15355448548a7d119dbced9",
    "signature": "0x4c9d6d47394aa2151b785a90c5c65677bfe71ec8665f3d1de762b9b20995bf281459ccb1fcb26d9002a345da5999c263c408ed813f3814abc47d85eb28ecf0051c",
    "signer": "0x473784A6Db124b95de277d9A2527561BA95e7133",
    "userId": "957849040"
  }
}