{
  "manageEntity": {
    "action": "Save",
    "entityId": "1368802445",
    "entityType": "Track",
    "nonce": "0xb18fb5aa5017536d8b507357632ff24d161cbe76c0bf8fa71a41460924b52895",
    "signature": "0xc924056f490d0ca806a5faac5146661187fb061ac463f6ecbe7d40c782ae9553440fedccbc10cf9890450512c6677aa1b8bf16b8724730558a8c2edd6d1d5d021c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}