{
  "manageEntity": {
    "action": "Save",
    "entityId": "1073487469",
    "entityType": "Track",
    "nonce": "0x4ce601a3c1867c45ea37e8b045d2a4efafc7402f98464d54e26cb5ccef0a5e7d",
    "signature": "0x917d7701251249033f5460132c67f680f6ccd7bfaf3ed8653a675bf871ec334234bd5bffa760daa4298ce6ee955b89f18f7244cf367c20959641099ad2e61eda1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}