{
"manageEntity": {
"action": "Save",
"entityId": "291719475",
"entityType": "Track",
"nonce": "0x9ab4f936107b906928002f5cbd66115f8fef1c11a696f666e17eeec5a9486cf6",
"signature": "0x078c285b5877a02bc1dea27b6185e14ab3720c8e8ab68e7ea6f4c4ab0c4ebfa72d8530f75b215e1a4a0804d9dbcee2d332f97c87b547654a82e97608d411dc1f1b",
"signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
"userId": "854614078"
}
}