{
  "manageEntity": {
    "action": "Save",
    "entityId": "1560463681",
    "entityType": "Track",
    "nonce": "0xd5095178e6d5782075801743ecbe693ebfb182ef3cb7442524689906398dd432",
    "signature": "0x8f28e7706bfd8d4101c68852ae44b1f26268fd7f5f7a654c4aaa26962319655b134dabed1179ab5a1037e72b6151030355cf6b8220197abdbe3247702158767e1c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}