{
  "manageEntity": {
    "action": "Save",
    "entityId": "1038817998",
    "entityType": "Track",
    "nonce": "0x15ae2b0bcc65955b1cc8f131a987b201648737b2cf88596aa65c5e17abcf0aee",
    "signature": "0x29efdd8360af35071b210336810b96fcd5ec7e4c2a29ce45eb8d3b1b7cc0aaa84d47df8b86002f145b737f87ffbfba9808063ac3b15306aa2c91c7f424ef8f301b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}