{
  "manageEntity": {
    "action": "Save",
    "entityId": "636040",
    "entityType": "Track",
    "nonce": "0xe6cf4dbcac2ac6a7e906d089694a3928e0288ad6cf2e0afa43704ade71b309d5",
    "signature": "0x461538d7448ff5c54206f050dd899d6261f80242983b52a6f775edb59c92c942657e88efe093f51e7f59b0a927eeb9c54ee8d3183693801a9120c4a507903c081b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}