{
  "manageEntity": {
    "action": "Save",
    "entityId": "1441258975",
    "entityType": "Track",
    "nonce": "0x0a83508b7e2055eb220375401f7b9c2892866bb1fc3068b98d5dfbef05603292",
    "signature": "0x0b381d442ab55481eb66bcd3bc4e1aa1b0b255ce810995f1159ad3daa12f020650752115945cc36982d1ca5c37dcdcff13bb1785e5b84e7f89d0d45565f2af851c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}