{
  "manageEntity": {
    "action": "Save",
    "entityId": "1794143287",
    "entityType": "Track",
    "nonce": "0x623c2e214b64eeefcabf2450a3dab5bc188cf5495b23453f0c76c23410b35ed6",
    "signature": "0x585d2f906419b020cf2871d23233c5d35963f38ee7b4203923bc12ae82f717a161ef793940e508a44a43c5bdb8d4fb8c26bd6e3e25147f4edc4a303c6a9804b61c",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}