{
  "manageEntity": {
    "action": "Save",
    "entityId": "1501228648",
    "entityType": "Track",
    "nonce": "0xc5fea313e022d4ed934ce34e8442250e9a2deaf59b84ce4ec88154a23039f423",
    "signature": "0x97173d034c5237b06eb1616673ca43b48f5eb122a4d4fb4a17bcb7df17595de44b3116f6788c80f29f88b94526be40a7a9fe68dcec46d1d05a67d0fa9e7850141b",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}