{
  "manageEntity": {
    "action": "Save",
    "entityId": "193335",
    "entityType": "Track",
    "nonce": "0x401446ae6802088e3662214e58fc502b75eb049b62128580fd271348182dbdb8",
    "signature": "0x50ffda28fba0e1def719ce8da430fe0789f995d0a27e1272f652d0bb074eba4428f94f04f8470e1e6d091413bfa5eb362b1b1b50003a31a16e5ffe97d2e73fbd1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}