{
  "manageEntity": {
    "action": "Save",
    "entityId": "871217492",
    "entityType": "Track",
    "nonce": "0xf5db9b8b2519524c6fb317454ed9a36be22861ffcd40443930a46155ac968ac8",
    "signature": "0xa6c60b51e1967e1786654ea960956915aa44c5328b146b67aebf083c32b4bad040dfe049e480b1253e302e0819d6eff901575f71c76e317e373b84ded6eb5b3b1c",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}