{
  "manageEntity": {
    "action": "Save",
    "entityId": "162823896",
    "entityType": "Track",
    "nonce": "0x4a20d75ec8387defab84d462a4e89cd3343be32c1f7050c01af3e70b0f9ab78b",
    "signature": "0xa8bbddb949a74d6c17f68afe1e1cbf49013e57cdbbc268ebdfc39d0d706c9df8714d5b57a58804e84b14e39c7becf1c4b1e232707453c3509bab83cc863eabaf1b",
    "signer": "0x0Cb8508DC22f3eC228338F94fB8B4063F7418EDF",
    "userId": "708077815"
  }
}