{
  "manageEntity": {
    "action": "Save",
    "entityId": "956252235",
    "entityType": "Track",
    "nonce": "0xf8017e4fc243c314a0c88a84058d1917d71c5c43c525a9039fe887ae857fb9ca",
    "signature": "0xad04155263dcc92b25d87242028868154fb5452b3be2da25cbb664d8fffff0304bdfd91434a342cd7e3f0feb374b54598d17e41991761e4565d7094a7afd7e901c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}