{
  "manageEntity": {
    "action": "Save",
    "entityId": "1019841",
    "entityType": "Track",
    "nonce": "0x672d9006db48c80fe245bbbcc517478e86327a42c4bd3f411ab4f1f06fff889c",
    "signature": "0x1ac78bc6845fce908c3cf1cd50fe9fd9118fba73e37294d36665e50f9e690c8b4ab2e633cc44bde866b49f4a89889cbe617aa6f9e848fc2eae73558e5d3572df1b",
    "signer": "0x722b43224Dbc7d6931b3C690696EF03933374bff",
    "userId": "772126389"
  }
}