{
  "manageEntity": {
    "action": "Save",
    "entityId": "1911520384",
    "entityType": "Track",
    "nonce": "0xef5ae907df3214212dfd15647f14f061fedfdd8799cf5a79ca3c6c40859700ec",
    "signature": "0x373419814895e429f756581d3484a24aefd59483f7eb876ebe1ea61d8d5908d9302e048fbe255efa5c906e4ce000583f3f5a0560e3351156f73cf7ddbd7dd5041c",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}