{
  "manageEntity": {
    "action": "Save",
    "entityId": "456510",
    "entityType": "Track",
    "nonce": "0xb617af88c781fab8192ad13aff12d050cd8a63654a3bcfc38a9e960e0aa8993d",
    "signature": "0x88c2f1eae311ac09ea4b991284e706a91a181bfe6450c408dcb078e7e47eac91431f3084d67dca27d0f978422e8850052f1e0c1f54091f673e564da71d9bd0ce1b",
    "signer": "0xE0525026F59D952AE2CDA2f28771796C2d7f7D97",
    "userId": "448795276"
  }
}