{
  "manageEntity": {
    "action": "Save",
    "entityId": "775907867",
    "entityType": "Track",
    "nonce": "0x51c90f355274fd3a63b7b9d34163301250b1ce8d5fa586d95664cfaa883b124c",
    "signature": "0x097ea7a23dabd1b57bcc966da4c22b00273dfee423e7cd58289c10ebbdcc325f09dc7d85dccdf92585ad8cea3136505909d7aef88aadd3360e8b8a41a72a175b1c",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}