{
  "manageEntity": {
    "action": "Save",
    "entityId": "411413702",
    "entityType": "Track",
    "nonce": "0x8eba4d7be232a6a2f49e4128e8693c0d9fd79847d9b0004462f645dcb2315569",
    "signature": "0x61dd7ccda24e82abc8e68ed6fd314bbbdf80fb0ce7dcf1e29ea324ef01cb876b1e86acf371b6b7a297789ad300ee7045e0200aa24b254b49eef2d3be7654e4ca1b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}