{
  "manageEntity": {
    "action": "Save",
    "entityId": "53072598",
    "entityType": "Track",
    "nonce": "0xf4fa019a7f1f15e8c4351873bb08e4ecb4980039c89af1acc946a9c4be584153",
    "signature": "0x5af5a358f7d1548a50ea387fbb25429ab8fe1ba037052e548fb341a5c5a2c2e20434e6a8c21c0d5925d0e34d8121b6b0d7a149861104e6a721afaf97afc27e571c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}