{
  "manageEntity": {
    "action": "Save",
    "entityId": "854288403",
    "entityType": "Track",
    "nonce": "1786798696325392417",
    "signature": "0x414cb22259a749d3e492601c0ecd9f4ca09773062b15baf462230c5c37646786762ced1e79668c0247ea237e5c969c765ec5e2e2623e2581f7ae25d75e30bcbd1b",
    "signer": "0xd30fAF377491796757Ef4C1B0ccA8a407920e663",
    "userId": "451691735"
  }
}