{
  "manageEntity": {
    "action": "Save",
    "entityId": "325228",
    "entityType": "Track",
    "nonce": "0x9f1b51dd256d0428ff033577044b31dd7b543ab9006ebd9fb7389cad99420a21",
    "signature": "0xc4ef1ae9d80b36d51a323bcdb608f934f89403cbb694f3ac0e4f4aaac3cca79432fe6eca1cad5f5a825f020c046ba2bf6fe1a6a24b38b62cec92e1b7fc1119031c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}