{
"manageEntity": {
"action": "Save",
"entityId": "1751429460",
"entityType": "Track",
"nonce": "0x4451d1bb667fb216409fd9042fee74cf779030482cd8d875a965e60010a1cee2",
"signature": "0xacbc1467da969f90cacc8ccad31944e9c4d92134db8cee64ece2dc4ffe8c20f20dc9429523519f3dd1a92e79364e78836c47c8966be27780963fca20adb8362b1b",
"signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
"userId": "55290787"
}
}