{
  "manageEntity": {
    "action": "Save",
    "entityId": "359857672",
    "entityType": "Track",
    "nonce": "0x6f8604f6cf86c32b5aaa3866703d29fca165c093f995f63471a75ebf982bbc9c",
    "signature": "0xb944d3d3baf38c630412af1cecff943abc837bb62004d1ec2c592e4ec0c39ea963b20799557bcf3fbb046c17c99729dd9fca7c3be5ac31dee0ddee55c1c915ad1b",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}