{
  "manageEntity": {
    "action": "Save",
    "entityId": "21733",
    "entityType": "Track",
    "nonce": "0x13be7ffc9b42b2be8d506d47ba5bf8f094d91c7cbe5086ab9bf8b361c72b06b2",
    "signature": "0x96353e2855f925cb1b9e235a4256653ba270161f8b8b3e8a8dc76a1ba92c2e1a5825a9ac34c9c1ae4cab3bb7e910323d1438582110301a94c9602fd7f234a42a1c",
    "signer": "0x036B1ee0d2003ae5B5E252d58647d13f0e588EEB",
    "userId": "161353174"
  }
}