{
"manageEntity": {
"action": "Save",
"entityId": "309750601",
"entityType": "Track",
"nonce": "0xbd30f2a0b0b2a649f362fcb0a4a7da5297068ac2ce76fdd0d310e1964c89e263",
"signature": "0x753601890e4f4b4b1200b2a270bf15018b1b59de5826ee9e4c775cfb789205765e33924fec27d04bfe46d3f1e0c36c653096ffa8e59cc2c99d1c6a6871fc1f931b",
"signer": "0x2D566E1DaC6fc148a694abe846B32e39B6584aa5",
"userId": "890889753"
}
}