{
  "manageEntity": {
    "action": "Save",
    "entityId": "417094103",
    "entityType": "Track",
    "nonce": "0x9d5df9f6d743d43ae57c959b29b3caf708b795d6307f8bd68e978c9bd8fca7d5",
    "signature": "0x05a336cafdaeeff464109eca604bed84e5807796130a16a6d5e3faa5c3f7e40763ef983a12d84eb7d533da7800bbe657b4d49fb7b965ec964ad7d1d60db5613a1b",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}