{
  "manageEntity": {
    "action": "Save",
    "entityId": "1833890395",
    "entityType": "Track",
    "nonce": "0xba19a9b51535ae33d787a2e9f29359daa6534c027a23788e2a70015d53e3241d",
    "signature": "0x345cd1ef7b9ef23f5707956e8e5d5f0d10573f393fa68012539de35ee4b3f5cc1f99d22c0219061803f2539add3741f0ab5599ca3b61ed6615d9b7ea12247cfe1c",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}