{
  "manageEntity": {
    "action": "Save",
    "entityId": "510651657",
    "entityType": "Track",
    "nonce": "0x6b30c42d74141af146708ce9b6a951e240fd305fd9f58f2254c97a4fd9591161",
    "signature": "0x435ec7ae5803422bcedfc86230eae16502d4c7e216f9dd28fadd7917e21a7a69446846de8d2e17bd2f6affb6b775073aa40ac9ee0507d9fc705f4e4a9a8affe61c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}