{
  "manageEntity": {
    "action": "Save",
    "entityId": "1472699241",
    "entityType": "Track",
    "nonce": "0x35935e2a8992ffeb6939b30ea51d5a96e6059b2c489daef211e869d3829bfcdf",
    "signature": "0xfb47c1b4d309138737a49a9d0ef46ed01ebd9f80f3b966ea32aecd614c6164943b95fa57c35c1883bebc6dae27489f601ad19c648ec6ddcebadb1041142ff44d1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}