{
  "manageEntity": {
    "action": "Save",
    "entityId": "1579083918",
    "entityType": "Track",
    "nonce": "0xb43cf163c5dfc9f0ba4665a26fd8a329fc605e53860407b756726cfda842e2cc",
    "signature": "0x22c3830bea3f528cb5b41945f0678dace43aac64cd4ec6dbbb4a4025eaad0d1b6a81da12487e94301f183bb63cea3e56b1dfa2bdd355ba9dcce1098946004cb21b",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}