{
  "manageEntity": {
    "action": "Save",
    "entityId": "1840773604",
    "entityType": "Track",
    "nonce": "0xb13722913b8ec851389f546252c471b1382e8abfa31f7db45736f88b95a3d2c5",
    "signature": "0x1f85285534231baa65f4db09a6b729fe1711b66fb32da29cbeecf6c82dede1a06c6d4c4a39a71b8309b11ea2db0a5be1285fac5979d3b615e8db651ebc33790c1c",
    "signer": "0x67479063A246B10560F7FfC48Dba47268867417B",
    "userId": "745004514"
  }
}