{
"manageEntity": {
"action": "Save",
"entityId": "1504563358",
"entityType": "Track",
"nonce": "0xa7c13731baee5699422a09a45a8a82ce300898e3e04b239a5af33380e3ce356a",
"signature": "0xda0dae3b93ef141ef60351b2e0a0070c8a5f889dee72d203b02c490f7b19261d53c1935f3df33ca34adb6e28e254c29059becee6db282fe45d041d5fc94b423c1b",
"signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
"userId": "584186978"
}
}