{
  "manageEntity": {
    "action": "Save",
    "entityId": "270933105",
    "entityType": "Track",
    "nonce": "0x992f6c732f472f769c3c98bbdd7f1abb3e093e50971789d425e3fcbcddc321da",
    "signature": "0x44426a1281948748f65e75bd9164004ffe8de6fcaf5ce44a8a486108d63be797646cf15f0a6a358ed6ac1c6c5c5ef2e5f6991bce3d40f9bcbbb46df3e3325bd01c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}