{
  "manageEntity": {
    "action": "Save",
    "entityId": "1908558841",
    "entityType": "Track",
    "nonce": "0x455cb3c5bb9872ced96524907c2942099eea8efddc4009c7c5b5e94c091b7472",
    "signature": "0x5aa643c636da472fe10a9aeec0bb8d5fc61a3bec04f69f3c7059ef3d4a85668820abffab32b96b5753f9c5447112957bd4f5d2af130d5b128a50f0169d5797231b",
    "signer": "0x65b2681094e762CAD2349e6C1e2FbC8d54b9c046",
    "userId": "11153747"
  }
}