{
  "manageEntity": {
    "action": "Save",
    "entityId": "285509",
    "entityType": "Track",
    "nonce": "0xeecd5d920111b0ec94b4bc196eb382f4c033ca73b9795ec34a206146ed3fbf4a",
    "signature": "0x8e1f801377bab620300ba9c2d6d184f756058edfabc364c0401c5b4d1a1b0c531f7cd5f6917a37caa33d0e568d64248cd35e00bfe3528e54082c822d3f83ca741b",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}