{
"manageEntity": {
"action": "Save",
"entityId": "1895951663",
"entityType": "Track",
"nonce": "0xd3d74f29befc78e003344a7ae9b019129a12e1293e2bba0ab86e5e4e38267d3b",
"signature": "0xfd4541b810a4e3a9ba21f844492f2a321dfaa1ed15665e7c46fd8098af2bf4702ba35716b6b622b74c240bd5d445d7bc603e2dfaf1fd6ba674ec06eeb29f5e221b",
"signer": "0xe5438A08048A3A712bAD9e7882867157630CC4FF",
"userId": "810146956"
}
}