{
  "manageEntity": {
    "action": "Save",
    "entityId": "344722354",
    "entityType": "Track",
    "nonce": "0xec29515234c18b3932f59a80c65b1655c19cefc1063af22c2d7a96bd5630f8e4",
    "signature": "0x44af5af689d6af4244e7ea188291ec0d8415ea0aa0f36d4cafe499253fae160439de8f2b1f27fe818b669cad238ab4a28b447c40cf84b582448634ffe75594531c",
    "signer": "0x1816F6e4633FD46b2e614606143C41c41370D86a",
    "userId": "146164104"
  }
}