{
  "manageEntity": {
    "action": "Save",
    "entityId": "2061105218",
    "entityType": "Track",
    "nonce": "0x1eb8b257fdd5b809c307ef29acc8fe8ee28fee0176835ca5947fd06d8f377761",
    "signature": "0x3bb041716be10ccf8e06bcd527edc733b6829537b637e18782a5a4cf4522c7f07c326fcc2913b9f99e00024feb33d5ad1dec76553b946ec13e794d9e95ab0eb61c",
    "signer": "0xbd18A0CEDC52343842f076A474bA46656B93A232",
    "userId": "194819663"
  }
}