{
  "manageEntity": {
    "action": "Save",
    "entityId": "552004",
    "entityType": "Track",
    "nonce": "0x7291d87e13ec241468a559ad39ee500c3d378e848d750f13ac223fcafb7951d1",
    "signature": "0x1bb6dfd57a39a8ac7afaeab8bff8a6389e6156235a4fa51c23e041fb6c5d85c752ba968f12a26fbf1199c102a84b586207570e757fded62a0f154d409f0074061b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}