{
"manageEntity": {
"action": "Save",
"entityId": "2018400537",
"entityType": "Track",
"nonce": "1793068200413486433",
"signature": "0x21eb396166051a18cb99ce7a15613d6b4875e18e045af136ba256e9a1c5612533ec153a43622262afe060f8087d6b941a1fe711e6ff9974ad8434ac15f0cf0501c",
"signer": "0x6620103988B969bE5810F1B5530c1A44Fe6048A1",
"userId": "568518925"
}
}