{
  "manageEntity": {
    "action": "Save",
    "entityId": "432462",
    "entityType": "Track",
    "nonce": "0x2ec8a9816ba91ea85631c4306b2192289b2c31c2d3da07f402338d5b02094483",
    "signature": "0x471991b58e527b7833543db914b1f9fbb25b446e3288369ba868ce8aa7c921416fd3114a5146ee378b37211bfd610bee2998ae38fdb47481af8fbc72e2e8da1b1c",
    "signer": "0x4D8EDeF47b57f98c89BDFf851267B0327BE4cD05",
    "userId": "5307724"
  }
}