{
  "manageEntity": {
    "action": "Save",
    "entityId": "624957502",
    "entityType": "Track",
    "nonce": "0x26b787116670466fd393296625175d1126aa635edc296ee795ca99fdfabe0bb2",
    "signature": "0xf2a181eed8ea6f3ba0c6e8ff2b45f956a0c4968c7c8c2eea1202d5cfa78dbd9737179fcbe4355d66ed9ed0f820328dc8fbf4a9ee321d7c3b59facd18dedcf2121c",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}