{
  "manageEntity": {
    "action": "Save",
    "entityId": "658507491",
    "entityType": "Track",
    "nonce": "0x32a9676653e7759501357143b6281379944e26d7e0b40eb1f92d9e1d648de3f8",
    "signature": "0x3054777dc5e600c4c0ccc0a081acb7d39116ca43e33a61f121621d466e9166d43f1454f3cf0117ff50920e05adddc418402c4ab7c21a94cee909782f6db57c8a1b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}