{
  "manageEntity": {
    "action": "Save",
    "entityId": "292907",
    "entityType": "Track",
    "nonce": "0x009f173bbf870d39bd6861ef594112a57aa0df21e1bd37f7f71537e32539f339",
    "signature": "0x7d538809529224e2e86b472f53627bbdbf55caa05bfe54a564c0b0d90c257a2206c20681165dd12997c3ac79111e5d7f5ef386831eb234892ac906295b7f03e61c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}