{
  "manageEntity": {
    "action": "Save",
    "entityId": "1861784985",
    "entityType": "Track",
    "nonce": "1792357538246052225",
    "signature": "0x43544f810c9955d33c717ff79f0f35e6c53a849267e8e656fdf2be477de68fe029f32cc4703f8d3b2ac72167f1735d5ed0f96ae712d4a630d08c6da2dbe5a98b1c",
    "signer": "0xE9e5656ce6F7Fe41FDbCA982901407eB55765cD3",
    "userId": "670307808"
  }
}