{
  "manageEntity": {
    "action": "Save",
    "entityId": "860579788",
    "entityType": "Track",
    "nonce": "0x144757eb5e18cc4ea49bf4ba5eeb36ce32063717be1ee8896efbd072ad2dad2b",
    "signature": "0x7d57d8ca8771a6830bff8a292c7cc0623ecd42cb063796a05b8bf04e9a1f65f752b2fafb35ea9180860215c6e04ee3390b0453f5dad46c85fe055705929e649f1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}