{
  "manageEntity": {
    "action": "Save",
    "entityId": "322830",
    "entityType": "Track",
    "nonce": "0x39acc220f8d1014ea8752b7f93e51516afc4da7afa6e6ec15751d4fb0701c534",
    "signature": "0xbc5b414c78fcd83f1b41256f1ab50e9283435449dc4c3032f97254645de817e8746787790fd4fd92a9bc834d3b1817571385738b924c9f4aa1787242779ea9661b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}