{
"manageEntity": {
"action": "Save",
"entityId": "454974735",
"entityType": "Track",
"nonce": "0x10cf20b7e62b34f0e106b1a60f6e82ea7fc0bf1afcc116ee84ef512d89a5f4bb",
"signature": "0x4f1598b63f10e814107a7a1c2313b2709cb912b96255d8b92f61a90d4f2209d365c49d729077901d16d576f517c20779f9369b46e2d38da82590de9368b359e41c",
"signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
"userId": "614212580"
}
}