{
  "manageEntity": {
    "action": "Save",
    "entityId": "19182878",
    "entityType": "Track",
    "nonce": "0x7744ba2eaaa5ff7f1989d3130822dc34f996d1a4ae8e12521d7991059d27966b",
    "signature": "0x1930b15f7fcc3af214fff312706008a8e46e50b4ce3e128de41560b714d2fb6b739175535a061e3244e2ec091c5b814df9854b421e03585c0d1a58384efb535e1c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}