{
  "manageEntity": {
    "action": "Save",
    "entityId": "1502562759",
    "entityType": "Track",
    "nonce": "0xbeb58bcd8ba9c474cc1ec0153097895f560eb8ba90ee7be0ddd72d65ab7819c7",
    "signature": "0x11f088d477d9bf7698290a3142280acc7bd6c499a123566e38e0b22adc9d0d0c5e0cbb19c79c7cb2cbea0876ec25e409e4e7963dbde918b908b33ec747613a541b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}