{
  "manageEntity": {
    "action": "Save",
    "entityId": "115415256",
    "entityType": "Track",
    "nonce": "0x9fdb960196916034aa1019f271c809a3fd6f2b1e5a9bdb055f445167b7a1d371",
    "signature": "0x95aa4360d5e7699b1263d082862d1419ce76257ba0664ecc2bf5e3a87fc7af7a7ba74211fdc72f339c3600a504c103c2712e235ed433b8fb331b7b4ed774b5191b",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}