{
  "manageEntity": {
    "action": "Save",
    "entityId": "191914295",
    "entityType": "Track",
    "nonce": "0x1c237f00bf8ab49110e54cf1e86501d0a6df9358951097302ee3f8f6d674a3be",
    "signature": "0xb33472dc3799b02976e3fdc72fe72afc4b8fc15352d835c158001747a0a7057d3ffea8128834c6bfa0f2e843d923e72bf6defd6f9f2973b6987dbf90926dceb91b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}