{
  "manageEntity": {
    "action": "Save",
    "entityId": "541267",
    "entityType": "Track",
    "nonce": "0x6c083f2bb13e5b3bcc6aef931de628067fe4d2d3df882a9fd0b0f12edee30124",
    "signature": "0x26a686d29ff16f893c8587fca7a642dad1363a2fd5b4bd77395bb64afd3a43496482354d12065390fa7ba6df871dad23fca7f5ce0618b2b0a7775378cbf3208c1b",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}