{
  "manageEntity": {
    "action": "Save",
    "entityId": "1659953396",
    "entityType": "Track",
    "nonce": "0x72698312afb54e5ad9f2603a4b1b105196acd0a52507bc28ab318778b9255317",
    "signature": "0xb4c6a8486a6aedd631b25654821690d3297fce5eb6638c6b5ec1aa9c7ed440be1c6503ac05cd993e5f6f2c6bad490b885576f80989ddb5ed87c9bb2e6228dc631b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}