{
  "manageEntity": {
    "action": "Save",
    "entityId": "1767063226",
    "entityType": "Track",
    "nonce": "1789829290946069506",
    "signature": "0x8516da7719d8e4d5109570be83ce5c61785db112b0e840970f794b6e146bf89f6db5bbb279ede97b19f27f29ea276ec14e2678559eadf682ff3c5e96a366da5a1b",
    "signer": "0x6620103988B969bE5810F1B5530c1A44Fe6048A1",
    "userId": "568518925"
  }
}