{
  "manageEntity": {
    "action": "Save",
    "entityId": "1334005771",
    "entityType": "Track",
    "nonce": "0xbd2618867e4c66dc455d0aafca9011e761e5cbe1190a3435f71f09ac0597c04c",
    "signature": "0x66a039946095020235319889415d5eb11ba63afbe1184bf73f4a88a8d60717fd51bb667ca1cfd6caa7f33bd65fadc7b0eaf5e210f4d49072c4488dc4be01f1811c",
    "signer": "0xC52D6c1E255E7617F07475f531fCF4c870e7E31E",
    "userId": "587506327"
  }
}