{
  "manageEntity": {
    "action": "Save",
    "entityId": "2003707995",
    "entityType": "Track",
    "nonce": "0xd830a26f14aa4ea5c85e918cc50e5b4f9b5b3dd4be1cb209d50eec18af6c68ca",
    "signature": "0x3de2460b4cad0fc7a1ffc5514f2d4856430f8fae2e2018a786c7545c5c623c5f6d7e00a3e9d4c5a053a95b262bf45db29f7b22542169f965ffe16b94fa73f5961b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}