{
  "manageEntity": {
    "action": "Save",
    "entityId": "933201581",
    "entityType": "Track",
    "nonce": "0x93c811da0b57c7c76a4c5655572c5adf53ef17ff647a52f73f5ce2a770f054c6",
    "signature": "0xab293d597e77c7fbe7782796791f5faaeeeb298605a42aef2a9147bf0ba3ed6b6bda5dd9b5809cc2561ca940400132182d1e4a5fe9322581d839a95e945d16c61c",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}