{
  "manageEntity": {
    "action": "Save",
    "entityId": "735509",
    "entityType": "Track",
    "nonce": "0xeeeaeb6492292adfb19cf7fd5678e0591d8afdcfb3bb5a89d47a6035dd519fd0",
    "signature": "0x6f7aa8c7cd8a2488cb8747606cfba7411139307e88f93020536a23b975ba98490e7c432808abb07f4b6d5734b1fd976e3d30b42522236540e77f6c245b0a77891b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}