{
"manageEntity": {
"action": "Save",
"entityId": "752723471",
"entityType": "Track",
"nonce": "0x9254b81ffd8c8e1a89345dfd29736b8e316040037518af2c43e9b59b7ad3ad70",
"signature": "0x674e73249481c422b60017f2639894b6cf76c31acb3419bb4a479af97a72889374c196d4abc2ff821f8d859eddb4941864fab4bde4aca52b975a15d599065d591b",
"signer": "0xf75adc45948144ee7d18bD5B4AEf863989CB88E6",
"userId": "798360139"
}
}