{
  "manageEntity": {
    "action": "Save",
    "entityId": "344398139",
    "entityType": "Track",
    "nonce": "0xfa374c6f59f45d57571222c95bc2f2dfbb3199db2bffc1e19720c5b0c7587ea6",
    "signature": "0x790fde647db3ff599f525f043eaf347287d22bffd7fc8b5df57ba731212faf7c61140bd31a8f4114a5d1fcdb4f24f5c7e62d10bedcee92c5ea33361b0ae825691c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}