{
  "manageEntity": {
    "action": "Save",
    "entityId": "72887553",
    "entityType": "Track",
    "nonce": "1785970844754746405",
    "signature": "0xe44d4047bd12b03828fab927e77ba76c9ec43c65461a8f898c9018460bdf63813cbeb3d88cf9b84431447562d291d0739ec78cf7217c735fdb64a25573d07c021c",
    "signer": "0x6620103988B969bE5810F1B5530c1A44Fe6048A1",
    "userId": "568518925"
  }
}