{
  "manageEntity": {
    "action": "Save",
    "entityId": "1352506965",
    "entityType": "Track",
    "nonce": "0xafe0b7cb84aaba73019599446f30a57e4001ce2fbb7ed2e412835dfc6651b751",
    "signature": "0x7c9304e2be0c6d94878c56ee715172cbb15e955abb78dbb3dcad6e536f4abaf875ba2fd4b2bd0b4338d5a1311003cf5b417f0a8ae3ae2e558ddcbdd4fde448de1b",
    "signer": "0xC35123bF05ca0B3A7B333c53E47bcd9f9DA864d4",
    "userId": "33896318"
  }
}