{
  "manageEntity": {
    "action": "Save",
    "entityId": "53783",
    "entityType": "Track",
    "nonce": "0x639db898156f81e899ae08c6d28af5a588989a67b4a5f8e9ed7a873508899c81",
    "signature": "0x41bb1897bc174fe0c12f8c25f788968e1cce8fe52f3b298a8b1cf2098a7d73060e3a398d3e1792880ad1f828c2cebebda36bebe89cd42d748b765789ee55fa741b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}