{
"manageEntity": {
"action": "Save",
"entityId": "1395903772",
"entityType": "Track",
"nonce": "1792313757137962194",
"signature": "0x9e8d4902bb9a8e19d819dc501347b941151899f32142fb00327105e306ce88782ca7c60bedf7a2ce17397675e490818801f7a94f3c016423454e548c9320ebc51b",
"signer": "0xd30fAF377491796757Ef4C1B0ccA8a407920e663",
"userId": "451691735"
}
}