{
  "manageEntity": {
    "action": "Save",
    "entityId": "178252",
    "entityType": "Track",
    "nonce": "0xa69c3918266fef9b4a0c77d397c310d20af24477906a6ea9606c6023cf29d2de",
    "signature": "0x9ff559fac669ca581596d072961f901a1d6604a9889a2dfd6101f1b36406834d2bb60b97b670f002615f7073860831369f505fb349e6b1223311be98728835b41b",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}