{
  "manageEntity": {
    "action": "Save",
    "entityId": "479765370",
    "entityType": "Track",
    "nonce": "1789829290164817750",
    "signature": "0xca3f1ef6871522f84cb6bfa841bc162965441470bede08f6778f95e8cf10b6f25497edfae4509c8207a83ece98542bbeda5ee158a5528863667fe8247ae44b981c",
    "signer": "0x23dF8876fD80368D375d911e3CbDFd15B8e85CB5",
    "userId": "827420993"
  }
}