{
  "manageEntity": {
    "action": "Save",
    "entityId": "1961806839",
    "entityType": "Track",
    "nonce": "0xe65a9c98c93a54c8c1b9a82f3ebdbfebff4b42857e55b202dfd64f039e465920",
    "signature": "0x3d39c034d646c7497fc4692167f2cd7fe439cffd72a2411e15c722a419ac5d3c20811d4197764a98df9ac1ab2626f876daa0c5e0624e143aa97a376dccc14b1f1b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}