{
  "manageEntity": {
    "action": "Save",
    "entityId": "1897391631",
    "entityType": "Track",
    "nonce": "1792326514474719377",
    "signature": "0xf0465fdee934685b3e08d3eedeb047690c130861bc931d1f597d0a25f37e18b23c36a4c68cec4653743425d9ed0d189ea65af241948bab769ad4b851a4de94201b",
    "signer": "0x6620103988B969bE5810F1B5530c1A44Fe6048A1",
    "userId": "568518925"
  }
}