{
  "manageEntity": {
    "action": "Save",
    "entityId": "1190026529",
    "entityType": "Track",
    "nonce": "0xc78de5da73bf010c31aad84909d8e29949ecb0001e1010c9ed33c7477a57de84",
    "signature": "0xb3f57116b77e531af03d3623912bde26a0865092c5c410536aadf3557dade5bf11a85d99fd66b1af6cc734a61efb30588b9cc2b182ba73dc9e9a03dd7d680d141b",
    "signer": "0x45c4f1dcE13eeF476C74C5758696D56137253980",
    "userId": "824478223"
  }
}