{
  "manageEntity": {
    "action": "Save",
    "entityId": "112146788",
    "entityType": "Track",
    "nonce": "0x8401867e9192107be168c5a5079585cb4e0c14fad54ec70949e1cdd0f57656a9",
    "signature": "0x9044723ae08ee23a6a5bd4a7924ec720436957ffe637ec52e33ee3f556546a9140f5a811741a6b6c6e0383770b3845fde3f9b8a7bf0675c7e4ff472fc04847011c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}