{
  "manageEntity": {
    "action": "Save",
    "entityId": "543642205",
    "entityType": "Track",
    "nonce": "0xbef8833d68e6be289b32f7514dafdf788c22f4ce95dba532187b547dc2c084e4",
    "signature": "0x27c1e2e820253cc954fdf54489ebf736ea01dd18a7a4372b495e04de1a6504c65444fad3beed7c1ea44744b155072b9e6cbd25c8bb6ed07de5448c93d36a13b71c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}