{
  "manageEntity": {
    "action": "Save",
    "entityId": "1067110588",
    "entityType": "Track",
    "nonce": "0x6af8e77a448aa1decc9f2a2d7bbf7b19c3b291674e7e05c6ba14301ab9a5916c",
    "signature": "0xbc9baa1d17fba32783dada6ed113bd18a89e6f8b2e7b7835942f658f1d1b730205530e88721ada4e57de46e6afcea1eaf09c73a6ae52a711b9db9bb72f4a2bbd1b",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}