{
  "manageEntity": {
    "action": "Save",
    "entityId": "1426082220",
    "entityType": "Track",
    "nonce": "0x25aef0d2df9aa87e87ce22dc99f2c9f34bf40744ec5a9c815ff49a7966e3864f",
    "signature": "0x20bd755ce2812b75a4eb0d28508e01303a19f474c1204104280a20a58eff97f528db1960042d9ab7f8238ccb68bde2cf9fdfd6c851a6b7f1371e9ea0bfad5cec1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}