{
  "manageEntity": {
    "action": "Save",
    "entityId": "537630",
    "entityType": "Track",
    "nonce": "0x6847de06ac720f90fb26e21e3b01e72791af6bf2c6b640c05e0db15da7b99adc",
    "signature": "0x6d381c44b703e3653ad8e1057718a0c71b9c3c46950e54385fe5036ba32c97ad4a6f6e5f6a8588ddf66ec369d3c50d63d35fc23281421ef85b4f853d3a8606021c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}