{
  "manageEntity": {
    "action": "Save",
    "entityId": "1776769656",
    "entityType": "Track",
    "nonce": "0xc1d64378e0c1e8a10cf055037c3876c0e68bedf96d7edb194c991f1aea591f0f",
    "signature": "0xd9e5176e16591346e38e24f21f77027a10e9e071b0102eed8c3c34c0b8378cb4079c077b433732075aacf7cb1572f3f248ae020ec8c59e940daf2922e5b6db171c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}