{
  "manageEntity": {
    "action": "Save",
    "entityId": "617275478",
    "entityType": "Track",
    "nonce": "0x024358bbc167167da5ecc6cbacbb76d70550f8f8281db4e67b27e193cb87cd82",
    "signature": "0x1f9c89574bc6b838473e03dd622c27d67e1bbed0ef7065d63b042506ddc819b124ca0705ab62d2d9a56f0f01a516a94e54a1f1128cb8e817cae535968b64ccad1c",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}