{
  "manageEntity": {
    "action": "Save",
    "entityId": "475768330",
    "entityType": "Track",
    "nonce": "1789571779191266509",
    "signature": "0x9fb550abab084c07b30bb8baa65112de0d9afd9a99221f87f3b6ed1baab142ee3bc5ff92c21e5c2f44cd1c099bb792deb7462cbdd64e81cbf27509afb0b3330e1b",
    "signer": "0x23dF8876fD80368D375d911e3CbDFd15B8e85CB5",
    "userId": "827420993"
  }
}