{
  "manageEntity": {
    "action": "Save",
    "entityId": "470500317",
    "entityType": "Track",
    "nonce": "0x9c78ffe4d6602f54d954be4cfa9e82f44d2b55a2cf79a2dbac4a7627e0c4d071",
    "signature": "0x5f83e4931f27438a8d21cb9eae86c02bb1d99b69f506621aa8ba6f986371aaf0053a74fecc5c66dcba19932c4cc3e3d2f38ca9af05fbfe5bab2b91a212613d7e1c",
    "signer": "0x36d29AA5C780341f3b35bDE6c1411a7Abcf8794C",
    "userId": "571117272"
  }
}