{
  "manageEntity": {
    "action": "Save",
    "entityId": "254775521",
    "entityType": "Track",
    "nonce": "0x076f367d36f244bb8aee51d7b38698eb4665229c4c64401768209e1fb2c0e0e0",
    "signature": "0x3f2a2db32421d68626a7867ae8b7866950df58df5e4aa4d73a3e0994628fd5ac629cef7dc596269d851f8941b1749432413b55dd398117d95b1d46963ff2614d1c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}