{
  "manageEntity": {
    "action": "Save",
    "entityId": "2020081658",
    "entityType": "Track",
    "nonce": "0x1309ffbf7fb01c9037dc6028fbd5c4836bad5e3b65cd2c08f80fc732dbb107a1",
    "signature": "0x5f8e3b38e82ff8ac5b1ab0a3b9d482568c6f52a2f79c2616ad58510ed77a2e0a447033783e17c1ef686883b9112ced2f360d7331e34dbdc0c33a0383204e669f1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}