{
  "manageEntity": {
    "action": "Save",
    "entityId": "999732105",
    "entityType": "Track",
    "nonce": "0x9085ec7239b537661fb51d25869776ffb29c4b7ad359ce0eb161614963b47082",
    "signature": "0x772c9553b7d302406f977e4769fa892e2b378880fd7c247ef15510d9b3fcc5a2077693873c17350718f972eb7ec3a8df8754c269a101649d07b0720eecc4dbb11b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}