{
  "manageEntity": {
    "action": "Save",
    "entityId": "1098865513",
    "entityType": "Track",
    "nonce": "0x296a989722db7c6040a80ce5293bf49bd3bccf32a1d53bda2626d068a24501da",
    "signature": "0x92a2ad6eca7ff89bac06fed007d21eccf0c2a3a5393c0b58ac009aa4dab3c7e13fb864f81fd4cd27a1b5e240c64361e1f2d1a6d384617f26d020aa13c72941451b",
    "signer": "0xC1896EAF7ae2431A08647A163291b5a8A0cd2a6C",
    "userId": "185209372"
  }
}