{
  "manageEntity": {
    "action": "Save",
    "entityId": "1629195022",
    "entityType": "Track",
    "nonce": "0x15547da904e3ca0af52b132856e3adb988bc55cce02dd028580974e2f9c6947b",
    "signature": "0xb06c90e6276d125281cb6edd86291891c9dd8bc2c2031303004be834e64418dd44fcae177978a60a83d3c5c1b9211f5ed6a5a0f8afbc711648d2ae8c2df197551c",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}