{
  "manageEntity": {
    "action": "Save",
    "entityId": "29279841",
    "entityType": "Track",
    "nonce": "0x083a8247e76174bf454924ae753fbe27024b4f24e5da8c2db64a0f2290245714",
    "signature": "0x4800075be21132f30da13784403bc9a2775bcab3e178851cfe2e922a314249ba4ffc04a14625adefe904361674966cac780c70a84077660e01c4cc7378e608531c",
    "signer": "0x38C35E6d98e3a8e47c96Cc5d8e8DC05C8797Ce75",
    "userId": "266305231"
  }
}