{
  "manageEntity": {
    "action": "Save",
    "entityId": "1615006829",
    "entityType": "Track",
    "nonce": "0xe4dc1768b337a29b9212b69ba85f94d886c9eb885928a671890bf16067a280fb",
    "signature": "0xfcb60f47fcd502d9339155a9b419b73e0f10b6ef761447e4355fb13fa747f68a46857a79b2075a48f626bba11ead92127c562ea86ef7c2c65443c11341321ce91c",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}