{
  "manageEntity": {
    "action": "Save",
    "entityId": "476630732",
    "entityType": "Track",
    "nonce": "0x3b31edf24934e4ffcd8a6cf1d445240e88bc4ec588c7f4a23df5ed1a092bb752",
    "signature": "0x7831593456a157702326f0abd9726b8d57a703dd73f726e78b0f2f5fd735d968366e39ddb638c9662f25d7e9cbb80cf68f5368f96f60fd79e55470c9269ccfac1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}