{
  "manageEntity": {
    "action": "Save",
    "entityId": "1570242322",
    "entityType": "Track",
    "nonce": "0xc6413d4e06480b16ee6baff3572d40fd8247ac82ffacff3253ab0243362a21c5",
    "signature": "0x41b49ff03ac6ff9a99f72d1b30b9ccfef4a123f482c0789deb83977980faee0f13b273dddb7c95025e2b6728dd081737dd153fb6dca712bdfb2363903db3c0c21c",
    "signer": "0x7fB23CaDa61ACB0c4fCc650FDE57c3B812d4A5f4",
    "userId": "66130"
  }
}