{
  "manageEntity": {
    "action": "Save",
    "entityId": "12743296",
    "entityType": "Track",
    "nonce": "0x68289ba018dbc95109dd53644f78f0ffb3668310fe8309a13a401bfbe3938992",
    "signature": "0xcc25cbac1809925c9ccbfd3348a279128470f1dc7c516f1aba0db295b43bd0e722652acc8893fd0b04d9dda027e4f0fd895cdae3a9985db67ecc61400b0e1ba61c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}