{
  "manageEntity": {
    "action": "Save",
    "entityId": "1739671124",
    "entityType": "Track",
    "nonce": "0xefcedf20d63cb5fe02dbc361ec9676b28bdfacb334a7d63b022e77fad6c2e039",
    "signature": "0xb345d0aac1550ff3b66882d2c4d2bf110cec25027114a9233eea2a058662664068bb9ae9e6391f797ef95099c28b8ffa8c1497cfe3b0271280395e1cdec4204f1b",
    "signer": "0x5bBd3715DF4fE9E1162E48f5E58d1f53928a5D3A",
    "userId": "346245555"
  }
}