{
  "manageEntity": {
    "action": "Save",
    "entityId": "1290982640",
    "entityType": "Track",
    "nonce": "0x6518a3c3163f1fab46d0cfd8fe85aa479c4dec174951eac967aee609cb87fad6",
    "signature": "0x8f4354648d9f52b08293a44e15a59079f02952b31ac1aae660807641b4d9b9d241ed25ac17b1664781b1706c59839c5de9c5acb8e71e73d55202c181fa2670eb1b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}