{
  "manageEntity": {
    "action": "Save",
    "entityId": "108175473",
    "entityType": "Track",
    "nonce": "0x8ce6ae0d09d69da7be8c4d3caf6db7e6b2c4d865ec8168d851bec22dbdcf4513",
    "signature": "0x0d9cf3eebd58366dd30405f98f8df3819d8c385e0bbf310caff8ade9e4cd60433c30faaf7f4251c4e99bb31ea580701e5535aa72ecac2c90c734215e1248d4751c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}