{
  "manageEntity": {
    "action": "Save",
    "entityId": "567281",
    "entityType": "Track",
    "nonce": "0x3982c57cfb8a9e8ab764fd25dddab498fa21d00b2ab9b0b63a6cdf61cc45c04c",
    "signature": "0xaf9f7ed70cbce6d76fde57d72f3a600972e666ed44bcdc3733ae5c0085b85acf63d5393d9f2fbf1acea1fba286e82bebe231aacdda0c6d1f857b46623064bdba1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}