{
  "manageEntity": {
    "action": "Save",
    "entityId": "2114545703",
    "entityType": "Track",
    "nonce": "0x5af2f5056c4bfba9b737116a768a4e9721358ffc0986371bac42f35bdc20ab93",
    "signature": "0x24b6068d5e371b1fd9182b16af361e25e9de47bf16b8783a4cd3b6f68f3f62d27e21574a4657e6fdbe5900c51ff4bd2fce5305f1932c0f7fdc528225232d65c11c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}