{
  "manageEntity": {
    "action": "Save",
    "entityId": "819850548",
    "entityType": "Track",
    "nonce": "0xa9b9cd1431d16cc74843b3dd71c6f5c84c6a71a93c4538914ec5606a270ccf16",
    "signature": "0x6f7e32c494c782426d7bf850e63e8c0cd03ac56db96ba5d0d24eabd5b2eeccca08c1eec435c0674bd53afed78373496dcc83c04b2d78fbd4d6357e4e708a510e1b",
    "signer": "0x71214aDcb582235538B21960fE9660B5eb90084C",
    "userId": "50737590"
  }
}