{
  "manageEntity": {
    "action": "Save",
    "entityId": "1017724444",
    "entityType": "Track",
    "nonce": "0xcc5d095fd26ed06c9f7627a98b70a31c9556e6d9991d01d43d045d22394c9836",
    "signature": "0xfd63631554fb27775658c5ec55fdc9a700eab311d0500bd60954fbc541a39fdb371067e7b9340e5c58cb57c807cb4abcb4dbb8139ae518f39d9973ac3c9938901b",
    "signer": "0x629256a8696F1C3BF59aD9204C3Aa4dC8bc4C07d",
    "userId": "871265631"
  }
}