{
  "manageEntity": {
    "action": "Save",
    "entityId": "544575",
    "entityType": "Track",
    "nonce": "0xe86f2ed27ae1791d4b9f6630d25b14eaeae9f542c9857d771b0b898e797cd210",
    "signature": "0xc63d27209261dcd9b1e938d1ecda71394c2fc2660f0f582d8f12888e7a845c7e6635957588060fbe14b0668f71951d491aefd3898ced231829bb4c2ffbbaceca1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}