{
  "manageEntity": {
    "action": "Save",
    "entityId": "567884730",
    "entityType": "Track",
    "nonce": "0x8261d31a9961d83c283b66f4604d1d1614ee74da1313ee372ba87dff231aa512",
    "signature": "0x4caea4ae131bfaee4d83f37d6574fb49d367a806d62975e4282ef4361dc3456f4ed660817b0d71b4383d300775be720a6d1d08aaa9fe766d5e9ef8cfd31bf9551c",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}