{
  "manageEntity": {
    "action": "Save",
    "entityId": "1791801235",
    "entityType": "Track",
    "nonce": "0x59f6b7b775030b749e4d23b7bdf257af82c12bb7ec9e3a501e31c9b6183e77e1",
    "signature": "0x65b60acb3802091196e73d1e7af89036be41697dc0c8ca87881dc4a864adf8590b2c159d388a292d3d815ec4f6dfb9fbd520efe10f9d8f8cc42118c9d0b957b61b",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}