{
  "manageEntity": {
    "action": "Save",
    "entityId": "1466746367",
    "entityType": "Track",
    "nonce": "0x35e76e78246dae40331f02549758304007b81495e383596d733dd24a8518ec3b",
    "signature": "0x42efb14923c13b8e0964c28ff014b19535870571aa373d67badfb2e548b24c5f40e8ea961901784224fcc757916e6d326111f2c77edcf8c9ea3803efed2201f31b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}