{
"manageEntity": {
"action": "Save",
"entityId": "1021357",
"entityType": "Track",
"nonce": "0x290dd253d5ad9cdb165469e0ed5c102845c3731d7a11e5f2dde7d909d1887894",
"signature": "0x9661e4d73ce2be6a188260159c9d6f04f37c00bf36223ee1f5bc42b12eeeefd71f71dba2c4296db887def268175f12bcb5ed9ed38b115611f84a680b9474495c1c",
"signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
"userId": "881446128"
}
}