{
  "manageEntity": {
    "action": "Save",
    "entityId": "1148720614",
    "entityType": "Track",
    "nonce": "0x04ea06b6b9d362b633cb4a8eebc71e96c32cb95288be46e93935cd752071be6f",
    "signature": "0xf696f7655f003b36dce605a94809880c8505433663f14bfe3302155e948ea7a73709f8ea01161ff88eb2be526264f00adfe49a87a2c4af6cd4cf8cc4a8d19e851b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}