{
  "manageEntity": {
    "action": "Save",
    "entityId": "1733461282",
    "entityType": "Track",
    "nonce": "0x33adff97d5597ed68d88b0c8c9878cf0dd1b9184d90bc10acc505cb2beaf3622",
    "signature": "0xf723448917f4315eeda632fd3cda58363221dd5871cbb89fb8141338b22932ea7593bc119a40c304bc4884b8bd40639722c16a4e8c5aa04fe1b581c0c5c2380f1c",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}