{
  "manageEntity": {
    "action": "Save",
    "entityId": "317338",
    "entityType": "Track",
    "nonce": "0x1a5cf95191151c3f69c1f5e522d3c1859380f450c793c4cb406702712b1209f0",
    "signature": "0x7df4f66032e7c0d9092df62d7133c632187af1876dd263e6f9b6549174507591636a28cc76a38528d51eeb18c79f9a3a1ea947130c4bec3eda7cad53b986e99d1c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}