{
  "manageEntity": {
    "action": "Save",
    "entityId": "1546022051",
    "entityType": "Track",
    "nonce": "1792290761395560984",
    "signature": "0x05f49765362eb5fb1bb4e6c4f6c538765ec5cd6f51eb0817f2ee4c177fcfde3e5f0cfbc261ad79b8a5ddb7f8465609cee38579fa9d0b2d1da5426e7cc2483e7a1b",
    "signer": "0x6620103988B969bE5810F1B5530c1A44Fe6048A1",
    "userId": "568518925"
  }
}