{
  "manageEntity": {
    "action": "Save",
    "entityId": "240634274",
    "entityType": "Track",
    "nonce": "0x19466eeff8d31441d417fc6d58b5a7d7c577d05f1d3af0caf5cd509764521c0d",
    "signature": "0xbf86fa55ef9420d3170c37be812eee70a27f459b9eaac2000288d3872a05ee696464795b1f1447b78ec74ec84a3c89461e13e20d2133ba1d936797dc0d9422a51c",
    "signer": "0x6754A920da1003d0904BdFf228A6E217Cd12bF5E",
    "userId": "105562689"
  }
}