{
  "manageEntity": {
    "action": "Save",
    "entityId": "441612189",
    "entityType": "Track",
    "nonce": "0x7644399835ebedccd4fc3dd493307f754480cfb2d5f0a234e72ffcb684dda512",
    "signature": "0x05b2649d2c73a44c97cd930d83dba19c727bbdceeabd3bf74102de14dfc0938d6ed1bcb632ea677a8ab00e9b30712d25d7d53b6576501874fdee9fa3d3bd817e1b",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}