{
  "manageEntity": {
    "action": "Save",
    "entityId": "656307",
    "entityType": "Track",
    "nonce": "0xd9555d0ca7dd74f7ab0bb054e293d9773267fb2cf0307c29aa1d8ad62b852782",
    "signature": "0x7a14a35fc278b79a841f3e7ee5f2f1b0d6bebe7d0bfee383624616fc86e0246d506d8666f543fbbdf97660d8209e2ba2cecc0116de2f53cd53778913438e63421b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}