{
  "manageEntity": {
    "action": "Save",
    "entityId": "512817083",
    "entityType": "Track",
    "nonce": "0x82b331c314d6559d3d47c8e72d6995538fc15daafd809033c9bb6642cdad7a1e",
    "signature": "0xe20de36a27f8ac22a63b31b646a0fac77a62bc8703e11d1188974fdc8ed396c470a3dec2c245f9cba0c0d989dcd34f7915726cf36c577d3c24f9ac70632741b61b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}